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# Function to export the coverage information to a WIG file
export.wig <- function(cov.vector = "numeric", outfile = "character") {
# get attributes from cov.vector
chr <- attr(cov.vector, "chr")
start <- attr(cov.vector, "start")
bin_width <- attr(cov.vector, "bin_width")
str <- c()
if (bin_width > 1) {
# track definition in order to cope with the binned data
str <- paste("track type=wiggle_0 name=\"Rtrack\"\nfixedStep chrom=", chr,
" start=", start, " step=", bin_width, " span=", bin_width, sep = "")
} else {
str <- paste("track type=wiggle_0 name=\"Rtrack\"\nfixedStep chrom=", chr,
" start=", start, " step=1", sep = "")
}
write(str, outfile)
write(cov.vector, outfile, ncolumns = 1, append = TRUE)
}
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