R/env2Cdf.R

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

env2Cdf <- function(env, celfile, overwrite=FALSE, verbose=TRUE, ...) {
  require(env, character.only=TRUE) || stop("Package not loaded: ", env)


  # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  # Local functions
  # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  env2List <- function(u) {
    pmi <- u[,"pm"]
    mmi <- u[,"mm"]

    x <- (u-1) %% nrows;     # <= BUG?!? /HB 2010-05-20
    y <- (u-1) %/% nrows;    # <= BUG?!? /HB 2010-05-20
    nr <- nrow(u)

    if (all(is.na(mmi))) {
      # do PM only
      # so far this is not implemented
      #o <- which(!is.na(x))
      #g <- list(list(x=u$x[o], y=u$y[o],
      #       pbase=rep("T", times=nr), tbase=rep("A", times=nr),
      #       atom=v, indexpos=v, groupdirection="sense",
      #       natoms=nr, ncellsperatom=1))
      #names(g) <- id
      #list(unittype=1, unitdirection=1, groups=g, natoms=nr, ncells=nr,
      #   ncellsperatom=1, unitnumber=1)
      return(NULL)
    } else {
      # do PM and MM
      v <- 0:(nr-1)
      atom <- rep(v, times=2)
      o <- order(atom)
      g <- list(list(x=c(x)[o], y=c(y)[o],
             pbase=rep(c("A","T"), times=nr),
             tbase=rep(c("T","T"), times=nr),
             atom=atom[o], indexpos=atom[o], groupdirection="sense",
             natoms=nr, ncellsperatom=2)
           )
      #names(g) <- id
      list(unittype=1, unitdirection=1, groups=g, natoms=nr, ncells=nr*2,
           ncellsperatom=2, unitnumber=1)
    } # if (...)
  } # env2List()


  # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  # Validating arguments
  # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


  if (verbose) {
    cat("Reading environment: ", env, ".\n", sep="")
  }
  ffs <- as.list(get(env))

  if (verbose) {
    cat("Reading CEL file header.\n")
  }

  celHead <- .readCelHeader(celfile)
  nrows <- celHead$rows
  ncols <- celHead$rows;  # <= BUG?!? /HB 2010-05-20

  nunits <- length(ffs)

  ### make the input-list for the writeCdf-function
  if (verbose) {
    cat("Creating CDF list for ", nunits, " units.\n", sep="")
  }

  newCdfList <- lapply(ffs, FUN=env2List)
  #return(newCdfList)

  if (verbose) {
    cat("Adding group names to CDF list.\n")
  }

  nm <- names(newCdfList)
  for (ii in 1:nunits) {
    names( newCdfList[[ii]]$groups ) <- nm[ii]
    newCdfList[[ii]]$unitnumber <- ii
  }

  pdName <- gsub("cdf", "", env, fixed=TRUE)

  ## creating the cdf-header
  pathname <- sprintf("%s.cdf", pdName)
  newCdfHeader <- list(ncols=ncols, nrows=nrows, nunits=nunits, nqcunits=0,
    refseq="", chiptype=pdName, filename=pathname, rows=nrows, cols=ncols,
    probesets= nunits, qcprobesets=0, reference="")

  ### writing the cdf-file (binary-file)
  # Write to a temporary file
  pathnameT <- pushTemporaryFile(pathname, verbose=verbose)

  res <- .writeCdf(pathnameT, cdfheader=newCdfHeader, cdf=newCdfList,
           cdfqc=NULL, overwrite=overwrite, verbose=verbose)

  # Rename temporary file
  popTemporaryFile(pathnameT, verbose=verbose)

  invisible(pathname)
} # env2Cdf()

# For backward compatibility
Env2Cdf <- env2Cdf