R/AffymetrixCdfFile.getUnitGroupNamesFromUgcMap.R

In aroma.affymetrix: Analysis of Large Affymetrix Microarray Data Sets

setMethodS3("getUnitGroupNamesFromUgcMap", "AffymetrixCdfFile", function(this, ugcMap, ..., force=FALSE, verbose=FALSE) {
  # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  # Validate arguments
  # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  # Argument 'verbose':
  verbose <- Arguments$getVerbose(verbose)
  if (verbose) {
    pushState(verbose)
    on.exit(popState(verbose))
  }


  verbose && enter(verbose, "Extracting unit and group names from CDF")
  allUnits <- ugcMap[,"unit"]

  # Get unit names
  res <- data.frame(
    unitName = getUnitNames(this, units=allUnits),
    groupName = character(length(allUnits)),
    stringsAsFactors = FALSE
  )
  verbose && str(verbose, res)

  verbose && enter(verbose, "Reading all group names for units of interest")
  uniqueUnits <- unique(allUnits)
  groupNames <- .readCdfGroupNames(getPathname(this), units=uniqueUnits)
  verbose && cat(verbose, "First unit:")
  verbose && str(verbose, groupNames[1])
  verbose && exit(verbose)

  verbose && enter(verbose, "Calculating the number of groups per unit")
  unitSizes <- lapply(groupNames, FUN=length)
  unitSizes <- unlist(unitSizes, use.names=FALSE)
  uniqueUnitSizes <- sort(unique(unitSizes))
  verbose && exit(verbose)

  verbose && enter(verbose, "Building (unit name, group name) map")

  for (uu in seq_along(uniqueUnitSizes)) {
    unitSize <- uniqueUnitSizes[uu]
    verbose && enter(verbose, "Processing set #%d of %d containing units with a maximum of %d group(s)", uu, length(uniqueUnitSizes), unitSize)

    # Extract the group names for unit with 'unitSize' groups as a matrix
    idxs <- which(unitSizes == unitSize)
    units <- uniqueUnits[idxs]
    verbose && cat(verbose, "Number of units with ", unitSize,
                                            " group(s): ", length(units))

    if (length(units) > 0) {  # Isn't this always the case? /HB 2008-04-28
      names <- groupNames[idxs]
      names <- unlist(names, use.names=FALSE)
      names <- matrix(names, nrow=unitSize)
      verbose && cat(verbose, "Identfied group names:")
      verbose && str(verbose, names)

      # Find the subset of the UGC map that contains these units
      rrU <- (ugcMap[,"unit"] %in% units)
#      verbose && str(verbose, rrU)

      # For each possible group index...
      for (group in seq_len(unitSize)) {
        verbose && enter(verbose, "Group ", group)
        # Identify row in the UGC map containing those units and the group
        rrG <- (ugcMap[,"group"] == group)
#        verbose && str(verbose, rrG)
        rrUG <- which(rrU & rrG)
#        verbose && str(verbose, rrUG)
        if (length(rrUG) > 0) {
          unitsUG <- ugcMap[rrUG, "unit"]
          rr <- match(unitsUG, units)
          res[rrUG,"groupName"] <- names[group,rr]
        }
        verbose && exit(verbose)
      }
    }

    verbose && exit(verbose)
  } # for (uu ...)

  verbose && exit(verbose)

  if (nrow(res) != nrow(ugcMap)) {
    throw("Internal error: Number of extract unit and group names does not match the number of rows in the UGC map: ", nrow(res), " != ", nrow(ugcMap))
  }

  verbose && exit(verbose)

  res
}, protected=TRUE) # getUnitGroupNamesFromUgcMap()