help for pcorrmat
-------------------------------------------------------------------------------

Title

    pcorrmat --  Matrix of partial correlation coefficients controlled for a
                   fixed set of covariates

Syntax

        pcorrmat varlist1 [if] [in] [weight] , part(varlist2) [sig]

    varlist1 must contain at least 2 variables.
    varlist1 and varlist2 may contain time-series operators; see tsvarlist.
    by may be used with pcorrmat; see by.
    aweights and fweights are allowed; see weight.

Description

    pcorrmat displays a matrix of partial correlation coefficients of
    varlist1 with each other, while holding the variable(s) in varlist2
    constant. Only observations with non-missing values on all variables in
    varlist1 and varlist2 are used.  So each partial correlation in the
    matrix refers to the same sample.


Options

    part(varlist2) Specifies the variable or variables which will be held
        constant.

    sig Specifies that p-values are also displayed.


Saved results

        +-----------------+
    ----+ always returned +--------------------------------------------------

    r(pcorr) Matrix of partial correlations.

    r(N) Number of observations with non-missing values on all variables in
        varlist1 and varlist2.

    r(df) Number of degrees of freedom.

        +------------------+
    ----+ if sig specified +-------------------------------------------------

    r(t) Matrix of t statistics.


Example

    . pcorrmat price mpg weight, part(foreign)

    . pcorrmat price mpg weight, part(foreign) sig


Author

    Maarten L. Buis
    Vrije Universiteit Amsterdam
    Department of Social Research Methodology
    m.buis@fsw.vu.nl


Also see

    Manual:  [R] pcorr

    Online:  correlate, spearman, pcorr2 (if installed), partcorr (if
             installed)