[galaxy-dev] help on wig file

Hello, How can I change the "chromosome" name on a wig file to "chr"? FOr whatever reason when I try feeding this file with the program i am working with (CEAS package) it gives me an error. But when I use a wig file with chr it works fine This is how my wiggle file looks like: track type=wiggle_0 name="MACS_in_Galaxy_treat_CHROMOSOME_II" description="Shifted Merged MACS tag counts for every 1 bp" variableStep chrom=CHROMOSOME_II span=1 1 3 2 4 3 5 And this is how I need it to be: track type=wiggle_0 name="MACS_in_Galaxy_treat_I" description="Shifted Merged MACS tag counts for every 1 bp" variableStep chrom=I span=1 570 1 571 1 572 1 thanks alfonso