help get()
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Title
[P] matrix get -- Access system matrices
Syntax
matrix [define] matname = get(systemname)
where systemname is
_b coefficients after any estimation command
VCE covariance matrix of estimators after any estimation command
Rr constraint matrix after test
Cns constraint matrix after any estimation command
Description
The get() matrix function obtains a copy of an internal Stata system
matrix. Some system matrices can also be obtained more easily by
directly referring to the returned result after a command. In
particular, the coefficient vector can be referred to as e(b), the
variance-covariance matrix of estimators as e(V), and the constraints
matrix as e(Cns) after an estimation command.
See mat_put_rr for a programmer's command to directly post matname as the
internal Rr matrix.
Remarks
get() obtains copies of matrices containing coefficients and the
covariance matrix of the estimators after estimation commands (such as
regress and probit) and obtains copies of matrices left behind by other
Stata commands. The other side of get() is ereturn post, which allows
ado-file estimation commands to post results to Stata's internal areas;
see [P] ereturn.
Examples
. sysuse auto
. regress price weight mpg
. matrix list e(b)
. matrix list e(V)
. matrix b = get(_b)
. matrix V = get(VCE)
. matrix list b
. matrix list V
. test weight=1, notest
. test mpg=40, accum
. matrix rxtr=get(Rr)
. matrix list rxtr
Also see
Manual: [P] matrix get
Help: [P] matrix; [P] ereturn, [P] mat_put_rr
