Hello Ellen, The short answer is no, this is not a good idea. While you may be able to construct such a file and it may appear to function in some cases, you should expect the unexpected if the specification is not followed. One data value per base is implied (if not specifically noted in the FAQ) for the same reasons as you explain. For variable step files, some bases may have no values assigned, but none should have more than one.
Hopefully this helps! But please feel free to contact the mailing list support team again if you would like more assistance. Best, Jen UCSC Genome Browser Support On 9/7/10 5:20 PM, Ellen Kephart wrote: > Hi, > I've been doing some work with variableStep wiggle files and I have a > question I haven't been able to answer by referring to the specs (such > as http://genome.ucsc.edu/goldenPath/help/wiggle.html ). > Specifically, I'm wondering if it is valid to have a value for the > span parameter which is larger than the distance between any of the > data points. For example, if the file included the declaration > > variableStep chrom=chr2 span=5 > > would the following data be permissible? > > 300701 12.5 > 300704 20.1 > 300710 8.6 > > (Presumably, if it were, the 12.5 score would apply to bases 300701, > 702, and 703, but it would be overridden by the 300704 20.1 line; so > 704 - 708 would have score 20.1 ) > > I would greatly appreciate any clarification on this point. > > Thank you very much! > > - Ellen > > _______________________________________________ > Genome maillist - [email protected] > https://lists.soe.ucsc.edu/mailman/listinfo/genome _______________________________________________ Genome maillist - [email protected] https://lists.soe.ucsc.edu/mailman/listinfo/genome
