How can I obtain the correlation matrix as a Stata matrix?

The correlate command will report the correlation matrix of the data, but there are occasions when you need the matrix stored as a Stata matrix so you can further manipulate it. You can obtain it by typing

        . matrix accum R = varlist, nocons dev
        . matrix R = corr(R)

The first line places the cross-product matrix of the data in R. The second line converts that to a correlation matrix.