R/runspatialdecon.R
In Nanostring-Biostats/SpatialDecon: Deconvolution of mixed cells from spatial and/or bulk gene expression data
#' Run spatialdecon
#'
#' Runs spatialdecon from an S4 object
#' @param object An S4 object such as a Seurat object that includse a "Spatial" element in the "assays" slot or a GeoMxSet object
#' @param ... Arguments passed to spatialdecon
#' @return decon results in list or in GeoMxSet object
#'
setGeneric("runspatialdecon", signature = "object",
function(object, ...) standardGeneric("runspatialdecon"))
#' Run spatialdecon on a NanostringGeomxSet object
#'
#' A wrapper for applying spatialdecon to a NanostringGeomxSet object.
#'
#' @param norm_elt normalized data element in assayData in NanostringGeomxSet object
#' @param raw_elt raw data element in assayData in NanostringGeomxSet object
#' @param X Cell profile matrix. If NULL, the safeTME matrix is used.
#' @param wts Optional, a matrix of weights.
#' @param resid_thresh A scalar, sets a threshold on how extreme individual data
#' points' values
#' can be (in log2 units) before getting flagged as outliers and set to NA.
#' @param lower_thresh A scalar. Before log2-scale residuals are calculated,
#' both observed and fitted
#' values get thresholded up to this value. Prevents log2-scale residuals from
#' becoming extreme in
#' points near zero.
#' @param align_genes Logical. If TRUE, then Y, X, bg, and wts are row-aligned
#' by shared genes.
#' @param is_pure_tumor A logical vector denoting whether each AOI consists of
#' pure tumor. If specified,
#' then the algorithm will derive a tumor expression profile and merge it with
#' the immune profiles matrix.
#' @param cell_counts Number of cells estimated to be within each sample. If
#' provided alongside norm_factors,
#' then the algorithm will additionally output cell abundance esimtates on the
#' scale of cell counts.
#' @param cellmerges A list object holding the mapping from beta's cell names to
#' combined cell names. If left
#' NULL, then defaults to a mapping of granular immune cell definitions to
#' broader categories.
#' @param n_tumor_clusters Number of tumor-specific columns to merge into the
#' cell profile matrix.
#' Has an impact only when is_pure_tumor argument is used to indicate pure
#' tumor AOIs.
#' Takes this many clusters from the pure-tumor AOI data and gets the average
#' expression profile in each cluster. Default 10.
#' @param maxit Maximum number of iterations. Default 1000.
#' @importFrom Biobase assayData
#' @importClassesFrom GeomxTools NanoStringGeoMxSet
#'
#' @return For GeoMxSet object, if not given cellmerges and cell_counts, a valid GeoMx S4 object
#' including the following items
#' \itemize{
#' \item In pData
#' \itemize{
#' \item beta: matrix of cell abundance estimates, cells in rows and
#' observations in columns
#' \item p: matrix of p-values for H0: beta == 0
#' \item t: matrix of t-statistics for H0: beta == 0
#' \item se: matrix of standard errors of beta values
#' \item prop_of_all: rescaling of beta to sum to 1 in each observation
#' \item prop_of_nontumor: rescaling of beta to sum to 1 in each observation,
#' excluding tumor abundance estimates
#' \item sigmas: covariance matrices of each observation's beta estimates
#' }
#' \item In assayData
#' \itemize{
#' \item yhat: a matrix of fitted values
#' \item resids: a matrix of residuals from the model fit.
#' (log2(pmax(y, lower_thresh)) - log2(pmax(xb, lower_thresh))).
#' }
#' \item In experimentData
#' \itemize{
#' \item SpatialDeconMatrix: the cell profile matrix used in the decon fit.
#' }
#'}
#'
#'
#' if given cellmerges, the valid GeoMx S4 object will additionally include
#' the following items
#' \itemize{
#' \item In pData
#' \itemize{
#' \item beta.granular: cell abundances prior to combining closely-related
#' cell types
#' \item sigma.granular: sigmas prior to combining closely-related cell types
#' }
#'}
#'
#' if given cell_counts, the valid GeoMx S4 object will additionally include
#' the following items
#' \itemize{
#' \item In pData
#' \itemize{
#' \item cell.counts: beta rescaled to estimate cell numbers, based on
#' prop_of_all and nuclei count
#' }
#'}
#'
#' if given both cellmerges and cell_counts, the valid GeoMx S4 object will
#' additionally include the following items
#' \itemize{
#' \item In pData
#' \itemize{
#' \item cell.counts.granular: cell.counts prior to combining closely-related
#' cell types
#' }
#'}
#'
#' @examples
#'
#' ## GeoMxSet Object ##
#' library(GeomxTools)
#' datadir <- system.file("extdata", "DSP_NGS_Example_Data", package = "GeomxTools")
#' demoData <- readRDS(file.path(datadir, "/demoData.rds"))
#'
#' demoData <- shiftCountsOne(demoData)
#' target_demoData <- aggregateCounts(demoData)
#'
#' target_demoData <- normalize(target_demoData, "quant")
#'
#' demoData <- runspatialdecon(object = target_demoData,
#' norm_elt = "exprs_norm",
#' raw_elt = "exprs")
#'
#' @export
#' @rdname runspatialdecon
setMethod("runspatialdecon", "NanoStringGeoMxSet",
function(object, X = NULL, norm_elt = NULL, raw_elt = NULL,
wts = NULL,
resid_thresh = 3, lower_thresh = 0.5,
align_genes = TRUE,
is_pure_tumor = NULL, n_tumor_clusters = 10,
cell_counts = NULL,
cellmerges = NULL,
maxit = 1000){
# check that norm and raw data exists:
if(is.null(norm_elt)){
stop("norm_elt must be set")
}
if(is.null(raw_elt)){
stop("raw_elt must be set")
}
if (!is.element(norm_elt, names(object@assayData))) {
stop(paste(norm_elt, "is not an element in assaysData slot"))
}
if (!is.element(raw_elt, names(object@assayData))) {
stop(paste(raw_elt, "is not an element in assaysData slot"))
}
# prep components:
norm <- as.matrix(Biobase::assayDataElement(object , elt = norm_elt))
raw <- as.matrix(Biobase::assayDataElement(object , elt = raw_elt))
# estimate background
bg <- derive_GeoMx_background(norm = norm,
# access the probe pool information from the feature metadata
probepool = Biobase::fData(object)$Module,
# access the names of the negative control probes
negnames = Biobase::fData(object)$TargetName[Biobase::fData(object)$Negative])
# run spatialdecon:
result <- spatialdecon(norm = norm,
bg = bg,
X = X,
raw = raw,
wts = wts,
resid_thresh = resid_thresh,
lower_thresh = lower_thresh,
align_genes = align_genes,
is_pure_tumor = is_pure_tumor,
n_tumor_clusters = n_tumor_clusters,
cell_counts = cell_counts,
cellmerges = cellmerges,
maxit = maxit)
# append results to the object
# beta
Biobase::pData(object)[["beta"]] <- matrix(NA, nrow = ncol(object), ncol = nrow(result$beta),
dimnames = list(Biobase::sampleNames(object), rownames(result$beta)))
Biobase::pData(object)[["beta"]][colnames(result$beta), ] <- t(result$beta)
# p
Biobase::pData(object)[["p"]] <- matrix(NA, nrow = ncol(object), ncol = nrow(result$p),
dimnames = list(Biobase::sampleNames(object), rownames(result$p)))
Biobase::pData(object)[["p"]][colnames(result$p), ] <- t(result$p)
# t
Biobase::pData(object)[["t"]] <- matrix(NA, nrow = ncol(object), ncol = nrow(result$t),
dimnames = list(Biobase::sampleNames(object), rownames(result$t)))
Biobase::pData(object)[["t"]][colnames(result$t), ] <- t(result$t)
# se
Biobase::pData(object)[["se"]] <- matrix(NA, nrow = ncol(object), ncol = nrow(result$se),
dimnames = list(Biobase::sampleNames(object), rownames(result$se)))
Biobase::pData(object)[["se"]][colnames(result$se), ] <- t(result$se)
# prop_of_all
Biobase::pData(object)[["prop_of_all"]] <- matrix(NA, nrow = ncol(object), ncol = nrow(result$prop_of_all),
dimnames = list(Biobase::sampleNames(object), rownames(result$prop_of_all)))
Biobase::pData(object)[["prop_of_all"]][colnames(result$prop_of_all), ] <- t(result$prop_of_all)
# prop_of_nontumor
Biobase::pData(object)[["prop_of_nontumor"]] <- matrix(NA, nrow = ncol(object), ncol = nrow(result$prop_of_nontumor),
dimnames = list(Biobase::sampleNames(object), rownames(result$prop_of_nontumor)))
Biobase::pData(object)[["prop_of_nontumor"]][colnames(result$prop_of_nontumor), ] <- t(result$prop_of_nontumor)
# add yhat matrix
yhat_mat <- matrix(NA, nrow = nrow(object), ncol = ncol(object),
dimnames = dimnames(object))
yhat_mat[rownames(result$yhat), colnames(result$yhat)] <- result$yhat
Biobase::assayDataElement(object, "yhat") <- yhat_mat
# add resids matrix
resids_mat <- matrix(NA, nrow = nrow(object), ncol = ncol(object),
dimnames = dimnames(object))
resids_mat[rownames(result$resids), colnames(result$resids)] <- result$resids
Biobase::assayDataElement(object, "resids") <- resids_mat
# add X matrix
Biobase::fData(object)[["X"]] <- matrix(NA, nrow = nrow(object), ncol = ncol(result$X),
dimnames = list(Biobase::featureNames(object), colnames(result$X)))
Biobase::fData(object)[["X"]][rownames(result$X), ] <- result$X
# transpose 3-d array
trans <- function(array){
NewArray <- array(NA, dim = c(dim(array)[3], dim(array)[2], dim(array)[1]))
for(or in(seq_len(dim(array)[1]))){
for(oc in(seq_len(dim(array)[2]))){
NewArray[,oc,or] <- array[or,oc,]
}
}
array <- NewArray
}
if (is.null(cellmerges)) {
# add sigmas matrix
sigmas_mat <- trans(result$sigmas)
sigmas_dimname <- list(Biobase::sampleNames(object),
paste0("var", seq_len((dim(result$sigmas)[1]))),
paste0("var", seq_len((dim(result$sigmas)[2]))))
dimnames(sigmas_mat) <- sigmas_dimname
Biobase::pData(object)[["sigmas"]] <- array(NA, dim = c(ncol(object),
dim(result$sigmas)[1],
dim(result$sigmas)[2]),
dimnames = sigmas_dimname)
Biobase::pData(object)[["sigmas"]][unlist(dimnames(sigmas_mat)[1]),, ] <- sigmas_mat
} else {
# add sigma matrix
sigma_mat <- trans(result$sigma)
sigma_dimname <- list(Biobase::sampleNames(object),
paste0("var", seq_len((dim(result$sigma)[1]))),
paste0("var", seq_len((dim(result$sigma)[2]))))
dimnames(sigma_mat) <- sigma_dimname
Biobase::pData(object)[["sigma"]] <- array(NA, dim = c(ncol(object),
dim(result$sigma)[1],
dim(result$sigma)[2]),
dimnames = sigma_dimname)
Biobase::pData(object)[["sigma"]][unlist(dimnames(sigma_mat)[1]),, ] <- sigma_mat
# add beta.granular matrix
Biobase::pData(object)[["beta.granular"]] <- matrix(NA, nrow = ncol(object),
ncol = nrow(result$beta.granular),
dimnames = list(Biobase::sampleNames(object),
rownames(result$beta.granular)))
Biobase::pData(object)[["beta.granular"]][colnames(result$beta.granular), ] <- t(result$beta.granular)
# add sigma.granular matrix
sigma.granular_mat <- trans(result$sigma.granular)
sigma.granular_dimname <- list(Biobase::sampleNames(object),
paste0("var", seq_len((dim(result$sigma.granular)[1]))),
paste0("var", seq_len((dim(result$sigma.granular)[2]))))
dimnames(sigma.granular_mat) <- sigma.granular_dimname
Biobase::pData(object)[["sigma.granular"]] <- array(NA, dim = c(ncol(object),
dim(result$sigma.granular)[1],
dim(result$sigma.granular)[2]),
dimnames = sigma.granular_dimname)
Biobase::pData(object)[["sigma.granular"]][unlist(dimnames(sigma.granular_mat)[1]),, ] <- sigma.granular_mat
}
if (length(cell_counts) > 0) {
if (length(result$cell.counts) == 2){
# create cell.counts list
Biobase::pData(object)[["cell.counts"]] <- data.frame(matrix(NA,
nrow = ncol(object),
ncol = 2,
dimnames = list(Biobase::sampleNames(object),
c("cells.per.100", "cell.counts"))))
# add cells.per.100 matrix
Biobase::pData(object)[["cell.counts"]][["cells.per.100"]] <- matrix(NA, nrow = ncol(object),
ncol = nrow(result$cell.counts$cells.per.100),
dimnames = list(Biobase::sampleNames(object),
rownames(result$cell.counts$cells.per.100)))
Biobase::pData(object)[["cell.counts"]][["cells.per.100"]][colnames(result$cell.counts$cells.per.100), ] <- t(result$cell.counts$cells.per.100)
# add cell.counts matrix
Biobase::pData(object)[["cell.counts"]][["cell.counts"]] <- matrix(NA, nrow = ncol(object),
ncol = nrow(result$cell.counts$cell.counts),
dimnames = list(Biobase::sampleNames(object),
rownames(result$cell.counts$cell.counts)))
Biobase::pData(object)[["cell.counts"]][["cell.counts"]][colnames(result$cell.counts$cell.counts), ] <- t(result$cell.counts$cell.counts)
} else {
# create cell.counts list
Biobase::pData(object)[["cell.counts"]] <- data.frame(matrix(NA,
nrow = ncol(object),
ncol = 1,
dimnames = list(Biobase::sampleNames(object),
"cells.per.100")))
# add cells.per.100 matrix
Biobase::pData(object)[["cell.counts"]][["cells.per.100"]] <- matrix(NA, nrow = ncol(object),
ncol = nrow(result$cell.counts$cells.per.100),
dimnames = list(Biobase::sampleNames(object),
rownames(result$cell.counts$cells.per.100)))
Biobase::pData(object)[["cell.counts"]][["cells.per.100"]][colnames(result$cell.counts$cells.per.100), ] <- t(result$cell.counts$cells.per.100)
}
}
if (length(result$cell.counts.granular) > 0) {
if(length(result$cell.counts.granular) == 2){
# create cell.counts.granular list
Biobase::pData(object)[["cell.counts.granular"]] <- data.frame(matrix(NA,
nrow = ncol(object),
ncol = 2,
dimnames = list(Biobase::sampleNames(object),
c("cells.per.100",
"cell.counts"))))
# add cells.per.100 matrix
Biobase::pData(object)[["cell.counts.granular"]][["cells.per.100"]] <- matrix(NA, nrow = ncol(object),
ncol = nrow(result$cell.counts.granular$cells.per.100),
dimnames = list(Biobase::sampleNames(object),
rownames(result$cell.counts.granular$cells.per.100)))
Biobase::pData(object)[["cell.counts.granular"]][["cells.per.100"]][colnames(result$cell.counts.granular$cells.per.100), ] <- t(result$cell.counts.granular$cells.per.100)
# add cells.count matrix
Biobase::pData(object)[["cell.counts.granular"]][["cell.counts"]] <- matrix(NA, nrow = ncol(object),
ncol = nrow(result$cell.counts.granular$cell.counts),
dimnames = list(Biobase::sampleNames(object),
rownames(result$cell.counts.granular$cell.counts)))
Biobase::pData(object)[["cell.counts.granular"]][["cell.counts"]][colnames(result$cell.counts.granular$cells.per.100), ] <- t(result$cell.counts.granular$cell.counts)
} else {
# create cell.counts.granular list
Biobase::pData(object)[["cell.counts.granular"]] <- data.frame(matrix(NA,
nrow = ncol(object),
ncol = 1,
dimnames = list(Biobase::sampleNames(object),
"cells.per.100")))
# add cells.per.100 matrix
Biobase::pData(object)[["cell.counts.granular"]][["cells.per.100"]] <- matrix(NA, nrow = ncol(object),
ncol = nrow(result$cell.counts.granular$cells.per.100),
dimnames = list(Biobase::sampleNames(object),
rownames(result$cell.counts.granular$cells.per.100)))
Biobase::pData(object)[["cell.counts.granular"]][["cells.per.100"]][colnames(result$cell.counts.granular$cells.per.100), ] <- t(result$cell.counts.granular$cells.per.100)
}
}
object@experimentData@other$SpatialDeconMatrix <- result$X
return(object)
})
#' Run spatialdecon on a Seurat object
#'
#' A wrapper for applying spatialdecon to the Spatial data element in a Seurat object.
#' Unlike spatialdecon, which expects a normalized data matrix, this function operates
#' on raw counts. Scaling for total cells
#' @param X Cell profile matrix. If NULL, the safeTME matrix is used.
#' @param bg Expected background counts. Either a scalar applied equally to
#' all points in the count matrix, or a matrix with the same dimensions
#' as the count matrix in GetAssayData(object, assay = "Spatial").
#' Recommended to use a small non-zero value, default of 0.1.
#' @param wts Optional, a matrix of weights.
#' @param resid_thresh A scalar, sets a threshold on how extreme individual data
#' points' values
#' can be (in log2 units) before getting flagged as outliers and set to NA.
#' @param lower_thresh A scalar. Before log2-scale residuals are calculated,
#' both observed and fitted
#' values get thresholded up to this value. Prevents log2-scale residuals from
#' becoming extreme in
#' points near zero.
#' @param align_genes Logical. If TRUE, then Y, X, bg, and wts are row-aligned
#' by shared genes.
#' @param is_pure_tumor A logical vector denoting whether each AOI consists of
#' pure tumor. If specified,
#' then the algorithm will derive a tumor expression profile and merge it with
#' the immune profiles matrix.
#' @param cell_counts Number of cells estimated to be within each sample. If
#' provided alongside norm_factors,
#' then the algorithm will additionally output cell abundance esimtates on the
#' scale of cell counts.
#' @param cellmerges A list object holding the mapping from beta's cell names to
#' combined cell names. If left
#' NULL, then defaults to a mapping of granular immune cell definitions to
#' broader categories.
#' @param n_tumor_clusters Number of tumor-specific columns to merge into the
#' cell profile matrix.
#' Has an impact only when is_pure_tumor argument is used to indicate pure
#' tumor AOIs.
#' Takes this many clusters from the pure-tumor AOI data and gets the average
#' expression profile in each cluster. Default 10.
#' @param maxit Maximum number of iterations. Default 1000.
#' @return For Seurat Object, if not given cellmerges and cell_counts, a list
#' including the following items:
#' \itemize{
#' \item beta: matrix of cell abundance estimates, cells in rows and
#' observations in columns
#' \item p: matrix of p-values for H0: beta == 0
#' \item t: matrix of t-statistics for H0: beta == 0
#' \item se: matrix of standard errors of beta values
#' \item prop_of_all: rescaling of beta to sum to 1 in each observation
#' \item prop_of_nontumor: rescaling of beta to sum to 1 in each observation,
#' excluding tumor abundance estimates
#' \item yhat: a matrix of fitted values
#' \item resids: a matrix of residuals from the model fit.
#' (log2(pmax(y, lower_thresh)) - log2(pmax(xb, lower_thresh))).
#' \item X: the cell profile matrix used in the decon fit.
#' \item sigmas: covariance matrices of each observation's beta estimates
#'}
#'
#'
#' if given cellmerges, the list will additionally include
#' the following items
#' \itemize{
#' \item beta.granular: cell abundances prior to combining closely-related
#' cell types
#' \item sigma.granular: sigmas prior to combining closely-related cell types
#'}
#'
#' if given cell_counts, the list will additionally include
#' the following items
#' \itemize{
#' \item cell.counts: beta rescaled to estimate cell numbers, based on
#' prop_of_all and nuclei count
#'}
#'
#' if given both cellmerges and cell_counts, the list will
#' additionally include the following items
#' \itemize{
#' \item cell.counts.granular: cell.counts prior to combining closely-related
#' cell types
#'}
#' @importFrom SeuratObject GetAssayData
#' @importClassesFrom GeomxTools NanoStringGeoMxSet
#' @export
#' @examples
#' ## Seurat Object ##
#' # get dataset
#' con <- gzcon(url("https://github.com/almaan/her2st/raw/master/data/ST-cnts/G1.tsv.gz"))
#' txt <- readLines(con)
#' temp <- read.table(textConnection(txt), sep = "\t", header = TRUE, row.names = 1)
#' # parse data
#' raw = t(as.matrix(temp))
#' norm = sweep(raw, 2, colSums(raw), "/") * mean(colSums(raw))
#' x = as.numeric(substr(rownames(temp), 1, unlist(gregexpr("x", rownames(temp))) - 1))
#' y = -as.numeric(substr(rownames(temp),
#' unlist(gregexpr("x", rownames(temp))) + 1, nchar(rownames(temp))))
#' # put into a seurat object:
#' andersson_g1 = SeuratObject::CreateSeuratObject(counts = raw, assay="Spatial")
#' andersson_g1@meta.data$x = x
#' andersson_g1@meta.data$y = y
#'
#' res <- runspatialdecon(andersson_g1)
#' str(res)
#' @rdname runspatialdecon
setMethod("runspatialdecon", "Seurat", function(
object,
X = NULL,
bg = 0.1,
wts = NULL,
resid_thresh = 3, lower_thresh = 0.5,
align_genes = TRUE,
is_pure_tumor = NULL,
n_tumor_clusters = 10,
cell_counts = NULL,
cellmerges = NULL,
maxit = 1000) {
# check that it's a spatial assay:
if (!is.element("Spatial", names(object@assays))) {
stop("Expecting \'Spatial\' element in assays slot")
}
# prep components:
raw <- as.matrix(SeuratObject::GetAssayData(object, assay = "Spatial"))
# make bg a matrix if only a scalar was specified:
if (length(bg) == 1) {
bg <- 0 * raw + bg
}
# run spatialdecon:
res <- spatialdecon(norm = raw,
bg = bg,
X = X,
raw = raw,
wts = wts,
resid_thresh = resid_thresh,
lower_thresh = lower_thresh,
align_genes = align_genes,
is_pure_tumor = is_pure_tumor,
n_tumor_clusters = n_tumor_clusters,
cell_counts = cell_counts,
cellmerges = cellmerges,
maxit = maxit)
return(res)
})
Nanostring-Biostats/SpatialDecon documentation built on Dec. 19, 2024, 12:57 a.m.
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#' Run spatialdecon
#'
#' Runs spatialdecon from an S4 object
#' @param object An S4 object such as a Seurat object that includse a "Spatial" element in the "assays" slot or a GeoMxSet object
#' @param ... Arguments passed to spatialdecon
#' @return decon results in list or in GeoMxSet object
#'
setGeneric("runspatialdecon", signature = "object",
function(object, ...) standardGeneric("runspatialdecon"))
#' Run spatialdecon on a NanostringGeomxSet object
#'
#' A wrapper for applying spatialdecon to a NanostringGeomxSet object.
#'
#' @param norm_elt normalized data element in assayData in NanostringGeomxSet object
#' @param raw_elt raw data element in assayData in NanostringGeomxSet object
#' @param X Cell profile matrix. If NULL, the safeTME matrix is used.
#' @param wts Optional, a matrix of weights.
#' @param resid_thresh A scalar, sets a threshold on how extreme individual data
#' points' values
#' can be (in log2 units) before getting flagged as outliers and set to NA.
#' @param lower_thresh A scalar. Before log2-scale residuals are calculated,
#' both observed and fitted
#' values get thresholded up to this value. Prevents log2-scale residuals from
#' becoming extreme in
#' points near zero.
#' @param align_genes Logical. If TRUE, then Y, X, bg, and wts are row-aligned
#' by shared genes.
#' @param is_pure_tumor A logical vector denoting whether each AOI consists of
#' pure tumor. If specified,
#' then the algorithm will derive a tumor expression profile and merge it with
#' the immune profiles matrix.
#' @param cell_counts Number of cells estimated to be within each sample. If
#' provided alongside norm_factors,
#' then the algorithm will additionally output cell abundance esimtates on the
#' scale of cell counts.
#' @param cellmerges A list object holding the mapping from beta's cell names to
#' combined cell names. If left
#' NULL, then defaults to a mapping of granular immune cell definitions to
#' broader categories.
#' @param n_tumor_clusters Number of tumor-specific columns to merge into the
#' cell profile matrix.
#' Has an impact only when is_pure_tumor argument is used to indicate pure
#' tumor AOIs.
#' Takes this many clusters from the pure-tumor AOI data and gets the average
#' expression profile in each cluster. Default 10.
#' @param maxit Maximum number of iterations. Default 1000.
#' @importFrom Biobase assayData
#' @importClassesFrom GeomxTools NanoStringGeoMxSet
#'
#' @return For GeoMxSet object, if not given cellmerges and cell_counts, a valid GeoMx S4 object
#' including the following items
#' \itemize{
#' \item In pData
#' \itemize{
#' \item beta: matrix of cell abundance estimates, cells in rows and
#' observations in columns
#' \item p: matrix of p-values for H0: beta == 0
#' \item t: matrix of t-statistics for H0: beta == 0
#' \item se: matrix of standard errors of beta values
#' \item prop_of_all: rescaling of beta to sum to 1 in each observation
#' \item prop_of_nontumor: rescaling of beta to sum to 1 in each observation,
#' excluding tumor abundance estimates
#' \item sigmas: covariance matrices of each observation's beta estimates
#' }
#' \item In assayData
#' \itemize{
#' \item yhat: a matrix of fitted values
#' \item resids: a matrix of residuals from the model fit.
#' (log2(pmax(y, lower_thresh)) - log2(pmax(xb, lower_thresh))).
#' }
#' \item In experimentData
#' \itemize{
#' \item SpatialDeconMatrix: the cell profile matrix used in the decon fit.
#' }
#'}
#'
#'
#' if given cellmerges, the valid GeoMx S4 object will additionally include
#' the following items
#' \itemize{
#' \item In pData
#' \itemize{
#' \item beta.granular: cell abundances prior to combining closely-related
#' cell types
#' \item sigma.granular: sigmas prior to combining closely-related cell types
#' }
#'}
#'
#' if given cell_counts, the valid GeoMx S4 object will additionally include
#' the following items
#' \itemize{
#' \item In pData
#' \itemize{
#' \item cell.counts: beta rescaled to estimate cell numbers, based on
#' prop_of_all and nuclei count
#' }
#'}
#'
#' if given both cellmerges and cell_counts, the valid GeoMx S4 object will
#' additionally include the following items
#' \itemize{
#' \item In pData
#' \itemize{
#' \item cell.counts.granular: cell.counts prior to combining closely-related
#' cell types
#' }
#'}
#'
#' @examples
#'
#' ## GeoMxSet Object ##
#' library(GeomxTools)
#' datadir <- system.file("extdata", "DSP_NGS_Example_Data", package = "GeomxTools")
#' demoData <- readRDS(file.path(datadir, "/demoData.rds"))
#'
#' demoData <- shiftCountsOne(demoData)
#' target_demoData <- aggregateCounts(demoData)
#'
#' target_demoData <- normalize(target_demoData, "quant")
#'
#' demoData <- runspatialdecon(object = target_demoData,
#' norm_elt = "exprs_norm",
#' raw_elt = "exprs")
#'
#' @export
#' @rdname runspatialdecon
setMethod("runspatialdecon", "NanoStringGeoMxSet",
function(object, X = NULL, norm_elt = NULL, raw_elt = NULL,
wts = NULL,
resid_thresh = 3, lower_thresh = 0.5,
align_genes = TRUE,
is_pure_tumor = NULL, n_tumor_clusters = 10,
cell_counts = NULL,
cellmerges = NULL,
maxit = 1000){
# check that norm and raw data exists:
if(is.null(norm_elt)){
stop("norm_elt must be set")
}
if(is.null(raw_elt)){
stop("raw_elt must be set")
}
if (!is.element(norm_elt, names(object@assayData))) {
stop(paste(norm_elt, "is not an element in assaysData slot"))
}
if (!is.element(raw_elt, names(object@assayData))) {
stop(paste(raw_elt, "is not an element in assaysData slot"))
}
# prep components:
norm <- as.matrix(Biobase::assayDataElement(object , elt = norm_elt))
raw <- as.matrix(Biobase::assayDataElement(object , elt = raw_elt))
# estimate background
bg <- derive_GeoMx_background(norm = norm,
# access the probe pool information from the feature metadata
probepool = Biobase::fData(object)$Module,
# access the names of the negative control probes
negnames = Biobase::fData(object)$TargetName[Biobase::fData(object)$Negative])
# run spatialdecon:
result <- spatialdecon(norm = norm,
bg = bg,
X = X,
raw = raw,
wts = wts,
resid_thresh = resid_thresh,
lower_thresh = lower_thresh,
align_genes = align_genes,
is_pure_tumor = is_pure_tumor,
n_tumor_clusters = n_tumor_clusters,
cell_counts = cell_counts,
cellmerges = cellmerges,
maxit = maxit)
# append results to the object
# beta
Biobase::pData(object)[["beta"]] <- matrix(NA, nrow = ncol(object), ncol = nrow(result$beta),
dimnames = list(Biobase::sampleNames(object), rownames(result$beta)))
Biobase::pData(object)[["beta"]][colnames(result$beta), ] <- t(result$beta)
# p
Biobase::pData(object)[["p"]] <- matrix(NA, nrow = ncol(object), ncol = nrow(result$p),
dimnames = list(Biobase::sampleNames(object), rownames(result$p)))
Biobase::pData(object)[["p"]][colnames(result$p), ] <- t(result$p)
# t
Biobase::pData(object)[["t"]] <- matrix(NA, nrow = ncol(object), ncol = nrow(result$t),
dimnames = list(Biobase::sampleNames(object), rownames(result$t)))
Biobase::pData(object)[["t"]][colnames(result$t), ] <- t(result$t)
# se
Biobase::pData(object)[["se"]] <- matrix(NA, nrow = ncol(object), ncol = nrow(result$se),
dimnames = list(Biobase::sampleNames(object), rownames(result$se)))
Biobase::pData(object)[["se"]][colnames(result$se), ] <- t(result$se)
# prop_of_all
Biobase::pData(object)[["prop_of_all"]] <- matrix(NA, nrow = ncol(object), ncol = nrow(result$prop_of_all),
dimnames = list(Biobase::sampleNames(object), rownames(result$prop_of_all)))
Biobase::pData(object)[["prop_of_all"]][colnames(result$prop_of_all), ] <- t(result$prop_of_all)
# prop_of_nontumor
Biobase::pData(object)[["prop_of_nontumor"]] <- matrix(NA, nrow = ncol(object), ncol = nrow(result$prop_of_nontumor),
dimnames = list(Biobase::sampleNames(object), rownames(result$prop_of_nontumor)))
Biobase::pData(object)[["prop_of_nontumor"]][colnames(result$prop_of_nontumor), ] <- t(result$prop_of_nontumor)
# add yhat matrix
yhat_mat <- matrix(NA, nrow = nrow(object), ncol = ncol(object),
dimnames = dimnames(object))
yhat_mat[rownames(result$yhat), colnames(result$yhat)] <- result$yhat
Biobase::assayDataElement(object, "yhat") <- yhat_mat
# add resids matrix
resids_mat <- matrix(NA, nrow = nrow(object), ncol = ncol(object),
dimnames = dimnames(object))
resids_mat[rownames(result$resids), colnames(result$resids)] <- result$resids
Biobase::assayDataElement(object, "resids") <- resids_mat
# add X matrix
Biobase::fData(object)[["X"]] <- matrix(NA, nrow = nrow(object), ncol = ncol(result$X),
dimnames = list(Biobase::featureNames(object), colnames(result$X)))
Biobase::fData(object)[["X"]][rownames(result$X), ] <- result$X
# transpose 3-d array
trans <- function(array){
NewArray <- array(NA, dim = c(dim(array)[3], dim(array)[2], dim(array)[1]))
for(or in(seq_len(dim(array)[1]))){
for(oc in(seq_len(dim(array)[2]))){
NewArray[,oc,or] <- array[or,oc,]
}
}
array <- NewArray
}
if (is.null(cellmerges)) {
# add sigmas matrix
sigmas_mat <- trans(result$sigmas)
sigmas_dimname <- list(Biobase::sampleNames(object),
paste0("var", seq_len((dim(result$sigmas)[1]))),
paste0("var", seq_len((dim(result$sigmas)[2]))))
dimnames(sigmas_mat) <- sigmas_dimname
Biobase::pData(object)[["sigmas"]] <- array(NA, dim = c(ncol(object),
dim(result$sigmas)[1],
dim(result$sigmas)[2]),
dimnames = sigmas_dimname)
Biobase::pData(object)[["sigmas"]][unlist(dimnames(sigmas_mat)[1]),, ] <- sigmas_mat
} else {
# add sigma matrix
sigma_mat <- trans(result$sigma)
sigma_dimname <- list(Biobase::sampleNames(object),
paste0("var", seq_len((dim(result$sigma)[1]))),
paste0("var", seq_len((dim(result$sigma)[2]))))
dimnames(sigma_mat) <- sigma_dimname
Biobase::pData(object)[["sigma"]] <- array(NA, dim = c(ncol(object),
dim(result$sigma)[1],
dim(result$sigma)[2]),
dimnames = sigma_dimname)
Biobase::pData(object)[["sigma"]][unlist(dimnames(sigma_mat)[1]),, ] <- sigma_mat
# add beta.granular matrix
Biobase::pData(object)[["beta.granular"]] <- matrix(NA, nrow = ncol(object),
ncol = nrow(result$beta.granular),
dimnames = list(Biobase::sampleNames(object),
rownames(result$beta.granular)))
Biobase::pData(object)[["beta.granular"]][colnames(result$beta.granular), ] <- t(result$beta.granular)
# add sigma.granular matrix
sigma.granular_mat <- trans(result$sigma.granular)
sigma.granular_dimname <- list(Biobase::sampleNames(object),
paste0("var", seq_len((dim(result$sigma.granular)[1]))),
paste0("var", seq_len((dim(result$sigma.granular)[2]))))
dimnames(sigma.granular_mat) <- sigma.granular_dimname
Biobase::pData(object)[["sigma.granular"]] <- array(NA, dim = c(ncol(object),
dim(result$sigma.granular)[1],
dim(result$sigma.granular)[2]),
dimnames = sigma.granular_dimname)
Biobase::pData(object)[["sigma.granular"]][unlist(dimnames(sigma.granular_mat)[1]),, ] <- sigma.granular_mat
}
if (length(cell_counts) > 0) {
if (length(result$cell.counts) == 2){
# create cell.counts list
Biobase::pData(object)[["cell.counts"]] <- data.frame(matrix(NA,
nrow = ncol(object),
ncol = 2,
dimnames = list(Biobase::sampleNames(object),
c("cells.per.100", "cell.counts"))))
# add cells.per.100 matrix
Biobase::pData(object)[["cell.counts"]][["cells.per.100"]] <- matrix(NA, nrow = ncol(object),
ncol = nrow(result$cell.counts$cells.per.100),
dimnames = list(Biobase::sampleNames(object),
rownames(result$cell.counts$cells.per.100)))
Biobase::pData(object)[["cell.counts"]][["cells.per.100"]][colnames(result$cell.counts$cells.per.100), ] <- t(result$cell.counts$cells.per.100)
# add cell.counts matrix
Biobase::pData(object)[["cell.counts"]][["cell.counts"]] <- matrix(NA, nrow = ncol(object),
ncol = nrow(result$cell.counts$cell.counts),
dimnames = list(Biobase::sampleNames(object),
rownames(result$cell.counts$cell.counts)))
Biobase::pData(object)[["cell.counts"]][["cell.counts"]][colnames(result$cell.counts$cell.counts), ] <- t(result$cell.counts$cell.counts)
} else {
# create cell.counts list
Biobase::pData(object)[["cell.counts"]] <- data.frame(matrix(NA,
nrow = ncol(object),
ncol = 1,
dimnames = list(Biobase::sampleNames(object),
"cells.per.100")))
# add cells.per.100 matrix
Biobase::pData(object)[["cell.counts"]][["cells.per.100"]] <- matrix(NA, nrow = ncol(object),
ncol = nrow(result$cell.counts$cells.per.100),
dimnames = list(Biobase::sampleNames(object),
rownames(result$cell.counts$cells.per.100)))
Biobase::pData(object)[["cell.counts"]][["cells.per.100"]][colnames(result$cell.counts$cells.per.100), ] <- t(result$cell.counts$cells.per.100)
}
}
if (length(result$cell.counts.granular) > 0) {
if(length(result$cell.counts.granular) == 2){
# create cell.counts.granular list
Biobase::pData(object)[["cell.counts.granular"]] <- data.frame(matrix(NA,
nrow = ncol(object),
ncol = 2,
dimnames = list(Biobase::sampleNames(object),
c("cells.per.100",
"cell.counts"))))
# add cells.per.100 matrix
Biobase::pData(object)[["cell.counts.granular"]][["cells.per.100"]] <- matrix(NA, nrow = ncol(object),
ncol = nrow(result$cell.counts.granular$cells.per.100),
dimnames = list(Biobase::sampleNames(object),
rownames(result$cell.counts.granular$cells.per.100)))
Biobase::pData(object)[["cell.counts.granular"]][["cells.per.100"]][colnames(result$cell.counts.granular$cells.per.100), ] <- t(result$cell.counts.granular$cells.per.100)
# add cells.count matrix
Biobase::pData(object)[["cell.counts.granular"]][["cell.counts"]] <- matrix(NA, nrow = ncol(object),
ncol = nrow(result$cell.counts.granular$cell.counts),
dimnames = list(Biobase::sampleNames(object),
rownames(result$cell.counts.granular$cell.counts)))
Biobase::pData(object)[["cell.counts.granular"]][["cell.counts"]][colnames(result$cell.counts.granular$cells.per.100), ] <- t(result$cell.counts.granular$cell.counts)
} else {
# create cell.counts.granular list
Biobase::pData(object)[["cell.counts.granular"]] <- data.frame(matrix(NA,
nrow = ncol(object),
ncol = 1,
dimnames = list(Biobase::sampleNames(object),
"cells.per.100")))
# add cells.per.100 matrix
Biobase::pData(object)[["cell.counts.granular"]][["cells.per.100"]] <- matrix(NA, nrow = ncol(object),
ncol = nrow(result$cell.counts.granular$cells.per.100),
dimnames = list(Biobase::sampleNames(object),
rownames(result$cell.counts.granular$cells.per.100)))
Biobase::pData(object)[["cell.counts.granular"]][["cells.per.100"]][colnames(result$cell.counts.granular$cells.per.100), ] <- t(result$cell.counts.granular$cells.per.100)
}
}
object@experimentData@other$SpatialDeconMatrix <- result$X
return(object)
})
#' Run spatialdecon on a Seurat object
#'
#' A wrapper for applying spatialdecon to the Spatial data element in a Seurat object.
#' Unlike spatialdecon, which expects a normalized data matrix, this function operates
#' on raw counts. Scaling for total cells
#' @param X Cell profile matrix. If NULL, the safeTME matrix is used.
#' @param bg Expected background counts. Either a scalar applied equally to
#' all points in the count matrix, or a matrix with the same dimensions
#' as the count matrix in GetAssayData(object, assay = "Spatial").
#' Recommended to use a small non-zero value, default of 0.1.
#' @param wts Optional, a matrix of weights.
#' @param resid_thresh A scalar, sets a threshold on how extreme individual data
#' points' values
#' can be (in log2 units) before getting flagged as outliers and set to NA.
#' @param lower_thresh A scalar. Before log2-scale residuals are calculated,
#' both observed and fitted
#' values get thresholded up to this value. Prevents log2-scale residuals from
#' becoming extreme in
#' points near zero.
#' @param align_genes Logical. If TRUE, then Y, X, bg, and wts are row-aligned
#' by shared genes.
#' @param is_pure_tumor A logical vector denoting whether each AOI consists of
#' pure tumor. If specified,
#' then the algorithm will derive a tumor expression profile and merge it with
#' the immune profiles matrix.
#' @param cell_counts Number of cells estimated to be within each sample. If
#' provided alongside norm_factors,
#' then the algorithm will additionally output cell abundance esimtates on the
#' scale of cell counts.
#' @param cellmerges A list object holding the mapping from beta's cell names to
#' combined cell names. If left
#' NULL, then defaults to a mapping of granular immune cell definitions to
#' broader categories.
#' @param n_tumor_clusters Number of tumor-specific columns to merge into the
#' cell profile matrix.
#' Has an impact only when is_pure_tumor argument is used to indicate pure
#' tumor AOIs.
#' Takes this many clusters from the pure-tumor AOI data and gets the average
#' expression profile in each cluster. Default 10.
#' @param maxit Maximum number of iterations. Default 1000.
#' @return For Seurat Object, if not given cellmerges and cell_counts, a list
#' including the following items:
#' \itemize{
#' \item beta: matrix of cell abundance estimates, cells in rows and
#' observations in columns
#' \item p: matrix of p-values for H0: beta == 0
#' \item t: matrix of t-statistics for H0: beta == 0
#' \item se: matrix of standard errors of beta values
#' \item prop_of_all: rescaling of beta to sum to 1 in each observation
#' \item prop_of_nontumor: rescaling of beta to sum to 1 in each observation,
#' excluding tumor abundance estimates
#' \item yhat: a matrix of fitted values
#' \item resids: a matrix of residuals from the model fit.
#' (log2(pmax(y, lower_thresh)) - log2(pmax(xb, lower_thresh))).
#' \item X: the cell profile matrix used in the decon fit.
#' \item sigmas: covariance matrices of each observation's beta estimates
#'}
#'
#'
#' if given cellmerges, the list will additionally include
#' the following items
#' \itemize{
#' \item beta.granular: cell abundances prior to combining closely-related
#' cell types
#' \item sigma.granular: sigmas prior to combining closely-related cell types
#'}
#'
#' if given cell_counts, the list will additionally include
#' the following items
#' \itemize{
#' \item cell.counts: beta rescaled to estimate cell numbers, based on
#' prop_of_all and nuclei count
#'}
#'
#' if given both cellmerges and cell_counts, the list will
#' additionally include the following items
#' \itemize{
#' \item cell.counts.granular: cell.counts prior to combining closely-related
#' cell types
#'}
#' @importFrom SeuratObject GetAssayData
#' @importClassesFrom GeomxTools NanoStringGeoMxSet
#' @export
#' @examples
#' ## Seurat Object ##
#' # get dataset
#' con <- gzcon(url("https://github.com/almaan/her2st/raw/master/data/ST-cnts/G1.tsv.gz"))
#' txt <- readLines(con)
#' temp <- read.table(textConnection(txt), sep = "\t", header = TRUE, row.names = 1)
#' # parse data
#' raw = t(as.matrix(temp))
#' norm = sweep(raw, 2, colSums(raw), "/") * mean(colSums(raw))
#' x = as.numeric(substr(rownames(temp), 1, unlist(gregexpr("x", rownames(temp))) - 1))
#' y = -as.numeric(substr(rownames(temp),
#' unlist(gregexpr("x", rownames(temp))) + 1, nchar(rownames(temp))))
#' # put into a seurat object:
#' andersson_g1 = SeuratObject::CreateSeuratObject(counts = raw, assay="Spatial")
#' andersson_g1@meta.data$x = x
#' andersson_g1@meta.data$y = y
#'
#' res <- runspatialdecon(andersson_g1)
#' str(res)
#' @rdname runspatialdecon
setMethod("runspatialdecon", "Seurat", function(
object,
X = NULL,
bg = 0.1,
wts = NULL,
resid_thresh = 3, lower_thresh = 0.5,
align_genes = TRUE,
is_pure_tumor = NULL,
n_tumor_clusters = 10,
cell_counts = NULL,
cellmerges = NULL,
maxit = 1000) {
# check that it's a spatial assay:
if (!is.element("Spatial", names(object@assays))) {
stop("Expecting \'Spatial\' element in assays slot")
}
# prep components:
raw <- as.matrix(SeuratObject::GetAssayData(object, assay = "Spatial"))
# make bg a matrix if only a scalar was specified:
if (length(bg) == 1) {
bg <- 0 * raw + bg
}
# run spatialdecon:
res <- spatialdecon(norm = raw,
bg = bg,
X = X,
raw = raw,
wts = wts,
resid_thresh = resid_thresh,
lower_thresh = lower_thresh,
align_genes = align_genes,
is_pure_tumor = is_pure_tumor,
n_tumor_clusters = n_tumor_clusters,
cell_counts = cell_counts,
cellmerges = cellmerges,
maxit = maxit)
return(res)
})
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