[R] question about using ancova in R to do variable selection

Spencer Graves spencer.graves at pdf.com
Sun Jun 11 03:02:53 CEST 2006

	  Have you tried Bioconductor (www.bioconductor.org)?  I haven't seen 
any replies to your question, and I know next to nothing about 
microarray data.  I understand that Bioconductor specializes in 
microarray and related data, has a listserve, etc.

	  hope this helps,
	  Spencer Graves

James Anderson wrote:
> Hi,
>   I have a microarray data which has about 10000 genes and 15 measurements. The 15 measurements contain 6 control, 3 low dose, 3 medium dose, 3 high dose. If I treat the dose level as a continuous variable, how can I use ANCOVA to do gene selection? (I mean to select those genes that response to different level of doses differently?). Thank you very much!
>   James
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