Introduction

In MiscMetabar: Miscellaneous Functions for Metabarcoding Analysis

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>",
  message = FALSE
)

Introduction to MiscMetabar: an R package to facilitate visualization and reproducibility in metabarcoding analysis

Raison d'être

• Complete R packages dada2 and phyloseq
• Useful visualizations (biplot_pq, circle_pq, upset_pq, ggvenn_pq)
• Facilitate the use of targets package

Quick overview

For an introduction to metabarcoding in R, Please visite the state of the field vignettes. The import, export and track vignette explains how import and export phyloseq object. Its also show how to summarize useful information (number of sequences, samples and clusters) accross bioinformatic pipelines.

If you are interested in ecological metrics, see the vignettes describing alpha-diversity and beta-diversity analysis. The vignette filter taxa and samples describes some data-filtering processes using MiscMetabar and the reclustering tutorial introduces the different way of clustering already-clustered OTU/ASV. The vignette tengeler explore the dataset from Tengeler et al. (2020) using some MiscMetabar functions.

For developers, I also wrote a vignette describing som rules of codes.

Summarize a physeq object

library("MiscMetabar")
library("phyloseq")
library("magrittr")
data("data_fungi")
summary_plot_pq(data_fungi)

Create an interactive table of the tax_table

data("GlobalPatterns", package = "phyloseq")
tax_datatable(subset_taxa(
  GlobalPatterns,
  rowSums(GlobalPatterns@otu_table) > 100000
))

Sankey diagram of the tax_table

gp <- subset_taxa(GlobalPatterns, GlobalPatterns@tax_table[, 1] == "Archaea")
sankey_pq(gp, taxa = c(1:5))

Upset plot for visualize distribution of taxa in function of samples variables

upset_pq(gp, "SampleType", taxa = "Class")

References

Tengeler, A.C., Dam, S.A., Wiesmann, M. et al. Gut microbiota from persons with attention-deficit/hyperactivity disorder affects the brain in mice. Microbiome 8, 44 (2020). https://doi.org/10.1186/s40168-020-00816-x

Session inform

sessionInfo()

MiscMetabar documentation built on Oct. 8, 2024, 1:07 a.m.