How to create a chromosome location map by locus ID

Whats wrong with things like the HapMap Genome Browser that allows you to
zoom in and out and to produce customised annotations of chromosomal
regions at varying resolutions (see http://www.hapmap.org/)?  Of course
I'm assuming that you are looking at human chromosomes ;-) If not
then perhaps the UCSC Genome Browser may be of use as it has a large
number genomes you can browse (see
http://genome.ucsc.edu/cgi-bin/hgGateway ).

If you really want to do this in R You might get some mileage out of the
lodplot package which can draw ideograms (which is what a schematic of a
choromsome with bandings from different stainings is called), although the
dataset available for it is again for human chromosomes (see
http://cran.r-project.org/web/packages/lodplot/index.html ).

Perhaps worth checking out the Genetics Task View too thats linked from
CRAN.

Neil

I'm well known with all the tools on the internet which allow you to find
the position of genes on a chromosome. The only thing is, none of them has
the function to upload a list of e.g. 300 genes. I have a list of over
expressed genes, and I want to know on which chromosome they are so I can
see if there is some kind of link between the genes and the position on a
chromosome. I already have made a list of the locus of each gene, but now I
want to make some sort of plot that allows me to visualise where the genes
are located. So the reason I don't use those webtools is because I have 300
genes and I'm not planning to search for each gene individual.
The lodplot package looks promising (already found it;-), but thanx
anyway!), but I did not yet figured out how to use it properly. I've not
found any tutorial or example data to test it.

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