Good Afternoon Michael: It isn't an error. It could be used to produce contextual zooming views. But that requires extra knowledge about what you would want to see on the higher level spans. Note slide 14 "Span" in this presentation: http://genome-test.cse.ucsc.edu/~hiram/wigglePresentation.html
Unfortunately this feature is complicated to document and explain and has never been used. It has been discontinued in the bigWig transition. Maybe I can disable it so you can get an error message or warning in the future. --Hiram ----- Original Message ----- From: "Michael Lawrence" <[email protected]> To: "Hiram Clawson" <[email protected]> Cc: "Michael Lawrence" <[email protected]>, [email protected] Sent: Monday, November 1, 2010 3:31:58 PM GMT -08:00 US/Canada Pacific Subject: Re: [Genome] wig with multiple blocks per chromosome On Mon, Nov 1, 2010 at 1:59 PM, Hiram Clawson < [email protected] > wrote: Good Afternoon Michael: You can't use different spans in the same data track for wiggle data. I see, I missed that part. It would be nice if the browser reported some sort of error or warning, rather than just omitting features. Thanks, Michael If your items have different sizes, use the bedGraph format and turn it into a bigWig file. http://genome.ucsc.edu/goldenPath/help/bedgraph.html http://genome.ucsc.edu/goldenPath/help/bigWig.html --Hiram Michael Lawrence wrote: Hi, Is the following a valid WIG file? track name="My Track" type=wiggle_0 fixedStep chrom=chr1 start=201491492 step=0 span=29 80.3 fixedStep chrom=chr1 start=201491528 step=0 span=80 99.5 When I upload to the genome browser, only the first interval is displayed. I can't find anywhere in the WIG format description that disallows using two blocks for the same chromosome: shouldn't they just be merged? Thanks, Michael _______________________________________________ Genome maillist - [email protected] https://lists.soe.ucsc.edu/mailman/listinfo/genome
