[BioC] Comparision of expression values from 4 different studies

[Rafael Irizarry]

what i did to combine data from 3 platofroms from 10 different labs is 
described here:

http://www.bepress.com/jhubiostat/paper71/

-r
On Feb 27, 2005, at 1:44 PM, Srinivas Iyyer wrote:

> Dear group, I have 4 microarray studies.  I am
> interested in comparing the expression (expression
> values) of my genes across these studies.
>
> I want to take expession value of gene A from first
> study and and take expression values from other
> studies, and compare them. Is this process
> statistically allowed. or do i have to do some
> treatments for all 4 studes, to bring to a some level
> so that the expression values can be comparable. Is
> meta-analysis is the way to go? please suggest..
> thank you very much
> srini
>
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