Hey,

So when I import BigWig files using a URL I get large temporary files named by the URL and called "SparseData" as so:

input$query_range="chr5 1293401 1296392"
split_query = strsplit(input$query_range,split="[\t ]")[[1]]
temp_grange = GRanges(seqnames=Rle(split_query[1]),
                      ranges=IRanges(start=as.integer(split_query[2]),
                                     end=as.integer(split_query[3]),
                                     name=split_query[1]), seqinfo=seqinfo(Hsapiens))
query_grange_flank = temp_grange
test_bw = BigWigFile("http://egg.wustl.edu/d/hg19/GSM935646_1.bigWig")
b = import(test_bw, selection = BigWigSelection(query_grange_flank), which = query_grange_flank)

I'm assuming rtracklayer is creating a temporary container for the bigWig data it pulls offline.

I'm wondering, is there any way to remove these temporary files after fetching the data?

--Thank you

This cache is implemented by the Jim Kent library underlying the BigWig support. In devel (1.31.2, forthcoming), I added a cleanupBigWigCache() that should cleanup files older than "maxDays" (which can be a fraction of a day).