How to convert bedgraph to wig
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ferbecneu • 0
@ferbecneu-16188
Last seen 24 months ago

Hi, i would like to convert a bedgraph document to wig format for downstream data analyisis for which I require a wig file. 

I have it in the format:

track name=CD6_1_RPMs description="read per million" type=bedGraph
chr1 3005880 3006265 0.788085378200589
chr1 3006269 3014101 0.788085378200589

 

Its from a 4c-seq RPM normalized counts and the coordinates represent fragments generated from RE digestion.

Is it possible to do this with Bioconductor?

Thank you very much!

rtracklayer genomicranges • 1.8k views
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@michael-lawrence-3846
Last seen 10 months ago
United States

bedGraph used to be a variant of WIG, so it might work as-is. But if not, then the ranges all need to be the same width, so in general they will all need to be length one. The GPos object is an efficient way to represent that, so you could load the data, convert to a GPos, and export.

Something like:

library(rtracklayer)
bg <- import("foo.bedGraph")
gp <- GPos(bg) # unfortunately need to carry over metadata manually
score(gp) <- rep(score(bg), width(bg))
export(gp, "foo.wig")

 

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Thank you very much! It was very helpful!

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