[R] Pairwise correlation
peter.langfelder at gmail.com
Wed Nov 16 20:27:43 CET 2011
On Wed, Nov 16, 2011 at 8:37 AM, muzz56 <musahass at gmail.com> wrote:
> Dear All,
> I am not familiar with R yet I want to use it to perform some task, hence my
> posting here. I hope someone can help.
> I have a set of data, genes (rows) and samples (columns). I want to do a
> Pearson correlation on all the possible pairwise combinations of all the
> genes (2000). Does anyone have an idea of how to execute this in R?
Put the expression data in a matrix called expression
Then simply execute
correlations = cor(t(expression))
If you have missing data, use
correlations = cor(t(expression), use = 'p')
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