How to save the results of calculations in a variable

Question

I have multiple lines of proportion calculations, like this:

proportion DIAEDUC

This command gives me the following result:

Proportion estimation             Number of obs   =     10,802

--------------------------------------------------------------
             |                                   Logit
             | Proportion   Std. Err.     [95% Conf. Interval]
-------------+------------------------------------------------
DIAEDUC      |
           0 |    .972774   .0025372      .9673336    .9773295
           1 |    .027226   .0025372      .0226705    .0326664
--------------------------------------------------------------

Is there a way to save the value .027226 in a variable?

Answer 1

The results are returned to the e(b) matrix:

sysuse auto, clear

proportion foreign

Proportion estimation             Number of obs   =         74

--------------------------------------------------------------
             | Proportion   Std. Err.     [95% Conf. Interval]
-------------+------------------------------------------------
foreign      |
    Domestic |   .7027027   .0534958      .5865827    .7974684
     Foreign |   .2972973   .0534958      .2025316    .4134173
--------------------------------------------------------------

matrix list e(b)

e(b)[1,2]
     foreign:  foreign:
    Domestic   Foreign
y1  .7027027  .2972973

You can then store the result of interest in a variable as follows:

matrix A = e(b)
generate result = A[1,2]

list result in 1

     +----------+
     |   result |
     |----------|
  1. | .2972973 |
     +----------+