hi,
 If you want to know how much variance is explained by all of your
components/ varaibles, then you can do a PCA in R (*prcomp* function). Like
it can explain how much of variation, among the samples, is explained by all
genes together; interpreted from the PC1 and PC2 returned.
   I am not sure whether the package FastICA has facility to do such. I
haven't used it.


best,

amit m

Graduate student
IGIB, Delhi

On Wed, Feb 23, 2011 at 1:59 AM, Pavel Goldstein <dao4free@gmail.com> wrote:

>  Hello,
> I think to use FastICA package for microarray data clusterization,
> but one question stops me:  can I know how much variance explain each
> component (or all components together) ?
> I will be very thankful for the help.
>
> Thanks,
>
> Pavel
>
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