Hi Michael,

Thanks for the fast patching. However, going a step further and trying to read the VCF again fails (with VariantAnnotation_1.9.35
).  I'm not sure if this is related to the same issue.

#+BEGIN_SRC R

library(VariantAnnotation)
example(VRanges)
writeVcf(vr, "out.vcf") ## works
readVcf("out.vcf", "hg19") ## fails

#+END_SRC

Error in `rownames<-`(`*tmp*`, value = c("chr1", "chr2")) :
  invalid rownames length

Best wishes
Julian


On 02/05/2014 08:38 PM, Michael Lawrence wrote:
Thanks, fixed in 1.9.35/1.8.11.


On Wed, Feb 5, 2014 at 12:35 AM, Julian Gehring <julian.gehr...@embl.de>wrote:

Hi,

I just stumbled over the fact that 'writeVcf' for a 'VRanges' fails if
'sampleNames' is a factor with unused levels.  Here a small example:

#+BEGIN_SRC R

library(VariantAnnotation)
example(VRanges)
writeVcf(vr, "out.vcf") ## works

f = sampleNames(vr)
f ## levels: a, b
levels(f) = c("a", "b", "c") ## c in unused
f ## levels: a, b, c
sampleNames(vr) = f
writeVcf(vr, "out.vcf")  ## fails

#+END_SRC

Error in writeVcf(as(obj, "VCF"), filename, ...) :
   error in evaluating the argument 'obj' in selecting a method for
function 'writeVcf': Error in ans[sampleToUniq] <- as.vector(v) :
replacement has length zero

This occurs both with the latest bioc-release and bioc-devel.  I don't
know what exactly is causing this, but please let me know if I can be of
any help.

Best wishes
Julian

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