Good Morning Varun:
The "variableStep" data format is explained on the page you reference:
http://genome.ucsc.edu/goldenPath/help/wiggle.html
Please note the description of what wiggle data is for on this description
page. It is for graphing data. It is not bed format and does not have
that meaning. If you have data you need to graph, use one of these
wiggle formats, or the more efficient bigWig format as explained on this
page. If you have annotations you want to display on the genome, you can
use bed format files.
--Hiram
varun gupta wrote:
> Hi everyone
> Thanks for your support and help
> I have a question. I am interested in understanding the wiggle format. I
> was going through this :
> http://genome.ucsc.edu/goldenPath/help/wiggle.html
>
> Can you explain me what does the last paragraph means
>
> *Caution for sparse variableStep data*
> *The wiggle format was designed for quickly displaying data that is quite
> dense. The variableStep format, in particular, becomes very inefficient
> when there are only a few data points per 1,024 bases. If variableStep data
> points (i.e., chromStarts) are greater than about 100 bases apart, it is
> advisable to use
> BedGraph<http://genome.ucsc.edu/goldenPath/help/bedgraph.html>
> format.*
> *
> *
> What do we mean by *variablestep data points* referred above. It would be
> nice if you can explain this
>
> Moreover can you suggest me how can we convert wiggle file into a bed file
>
> Thanks in advance
>
> Regards
> VARUN
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