[Genome] Possible WIG display bug?

[Martin Krzywinski]

To follow up on Gordon's report, I have found that a track such as
follows

browser position chr1:90-250
track type=wiggle_0 name='mappability' description='nmermappability'
visibility=full maxHeightPixels=40:40:20 color=100,100,200 yLineMark=0.0
yLineOnOff=on priority=10 viewLimits=0:1 autoScale=off graphType=points
fixedStep chrom=chr1 start=100 step=5 span=5
.25
.5
.75
fixedStep chrom=chr1 start=150 step=5 span=5
.25
.5
.75
fixedStep chrom=chr1 start=175 step=25 span=5
1
.75
.5

will not display some of the data points if the "span" value for any
fixedStep line is different. For example, if I set span=2 in the second
fixedStep instance, then only those data points will be displayed. Is
there any condition that would only make visible points associated with
the smallest span value?

Martin
 

Martin Krzywinski
Genome Sciences Centre
100-570 West 7th Avenue
Vancouver, BC, V5Z 4S6
Canada
t 604-877-6000x3262 :: f 604-876-3561
mkweb.bcgsc.ca :: martink at bcgsc.ca
 
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> -----Original Message-----
> From: Gordon Robertson 
> Sent: Friday, December 21, 2007 3:50 PM
> To: genome at soe.ucsc.edu
> Cc: Martin Krzywinski; Mikhail Bilenky
> Subject: Possible WIG display bug?
> 
> Hello
> 
> If I'm missing something obvious I apologize in advance, but 
> two of us have
> looked at this, and we think that we're seeing odd behaviour.
> 
> I've attached a txt file with two fixedStep regions declared 
> in a single
> track. When I submit this as a custom track file, it's accepted by the
> genome browser. I've attached a PDF screenshot (hg18) that 
> shows that only
> the second region displays, while the first region shows 
> nothing. The track
> header line was taken from your web help page's example file, 
> with graphType
> reset to 'bar'.
> 
> Is this file flagging a problem, or have we made a mistake in 
> the file?
> 
> Thank you for your help.
> 
> G
> -- 
> Gordon Robertson
> Gene Regulation Informatics
> Canada's Michael Smith Genome Sciences Centre
> 604-707-5900 x5416
> www.bcgsc.ca 
> 
>