BioConductor GViz: BiomartGeneRegionTrack/GeneRegionTrack stack height

[AndreasD]

Hello Community,

I'm using the bioconductor GViz package for visualizing SNPs and INDELs automatically. As I would like to know the gene-models of the shown regions within tracks of the created image I try the GeneRegionTrack as well as the BiomartGeneRegionTrack.

For simplification reason I use the BiomartGeneRegionTrack in this example:

# create track
biomartTrack <- BiomartGeneRegionTrack(genome="hg19", chromosome="chr17", start=41277600, end=41280000, name="ENSEMBL")
# plot track
plotTracks(biomartTrack)

The generated track contains several transcripts of 2 genes (orange and red) nicely aligned.
My problem is that I would like to adjust the size of the generated image dynamically therefore I need to now the height (number of lines) of the shown transcripts. In this case this number is 29 (manually counted). Is there a function which is able to determine this number?

Thanks.

[AndreasD]

BioStar question

Hi,

I posted the same question under http://www.biostars.org/p/73932/.