I am trying to do a pooled microarray analyze with arrays of different platform. In order to have a comparable data, I have come to the idea to convert the probes in each array to corresponding gene symbols, and use these gene expression data instead of probe expression as the data to analyze. I've tried to find a function of averaging probes to corresponding genes, but found nothing that meet my need. I have done a few google searches like "bioc average probe intensity to gene", "bioconductor average probe to gene", etc... and came up with no usable information. If anyone can give me a hint where I can find the function I need, I will very much appreciate. --==Mailed via NDMCTSGH Webmail==--

On Thu, Apr 1, 2010 at 3:41 AM, 697820169 <697820169 at mail.ndmctsgh.edu.tw> wrote: > I am trying to do a pooled microarray analyze with arrays > of different platform. In order to have a comparable data, > I have come to the idea to convert the probes in each array > ?to corresponding gene symbols, and use these gene expression > data instead of probe expression as the data to analyze. > > I've tried to find a function of averaging probes to > corresponding genes, but found nothing that meet my need. > I have done a few google searches like "bioc average probe > intensity to gene", "bioconductor average probe to gene", > etc... and came up with no usable information. > > If anyone can give me a hint where I can find the function I > need, I will very much appreciate. Have a look at the aggregate() function. Sean