pwcorr_a displays all the pairwise correlation coefficients between the variables in varlist or, if varlist is not specified, all the variables in the dataset.

The main differecne between pwcorr_a and the stata's official command pwcorr is that, pwcorr_a can display *** (1% significance level), ** (5% significance level), and * (10% significance level), say, at the same time, while in the case of pwcorr, only one of these can be done.

download pwcorr_a.ado and pwcorr_a.hlp and put them in ..\stata15\ado\plus\p. Then, type help pwcorr_a in stata command line