Hello Ariel,

You are correct, the Custom track feature no longer supports contigs 
position. Your file will need to be converted to chromosome position 
using your own tools and our mapping file.

Mapping file:
ctgPos table/file in Table browser or on Downloads page.
#contig    size    chrom    chromStart    chromEnd
NT_166307.1    175968    chr7_random    0    175968
NT_166308.1    136522    chr7_random    225968    362490

Other options:
There is a utility that does this type of lift, but it is in the kent 
source tree and would require considerable set-up to use. If you are 
already a kent source user, then the utility is called "liftUp" (not the 
same of liftOver). Perhaps also review the Galaxy web tool set:  
http://galaxy.psu.edu/

Going forward:
The team is discussing options concerning this functionality but nothing 
has been decided. If/when an implementation is made in the next week or 
so, we'll send you an email. After that, please feel free to check back 
later for an update.

Thanks,
Jennifer Jackson

Paulson, Ariel wrote:
> Hi,
>
> I have a bed file in which the coordinates for random chromosomes are given 
> by the contig instead, such as NT_166307 or NT_166038 instead of chr7_random. 
>  For instance:
>
> NT_166307       162     1062
> NT_166307       685     1608
> NT_166307       1253    2173
>
> The help files for BED format claim that this is possible, and I know these 
> contig-based coordinates exist because I can paste them directly into the 
> genome browser and they work.  But trying to load the bed file gives me the 
> "NT_166307 not a chromosome (note: chrom names are case sensitive)" error.
>
> I see that this problem has come up before in the mailing list archives 
> (April 8 2002) and supposedly it was fixed...  So what am I doing wrong?
>
> Thanks,
> Ariel
>
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