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.
. sysuse auto, clear
(1978 Automobile Data)
. pwcorr price wei len mpg
| price weight length mpg
-------------+------------------------------------
price | 1.0000
weight | 0.5386 1.0000
length | 0.4318 0.9460 1.0000
mpg | -0.4686 -0.8072 -0.7958 1.0000
. pwcorr_a price wei len mpg
| price weight length mpg
-------------+------------------------------------
price | 1.000
weight | 0.539*** 1.000
length | 0.432*** 0.946*** 1.000
mpg | -0.469*** -0.807*** -0.796*** 1.000