I have bigwig file downloaded from GEO, and convert it to wig file using bigwigToWig
(ftp://hgdownload.cse.ucsc.edu/apache/htdocs-rr/goldenPath/help/bigWig.html). And when I want to used sort-bed command in BEDOPS, it gives me error like this:
Non-numeric start coordinate. See line 1025 in GSM723005_H3K4me1-MEF.wig.
But I checked manually and didn't find anything wrong in this file.
If I don't use sort-bed, but just use convert it to bed file by myself, then run BEDOPS, it returns me empty output file (although I think the file is already sorted).
Any idea what went wrong to my procedure?
Thank you very much!