vech2mat

Fills a matrix from a vector that represents the lower triangle.
If user does not supply a value for diag, then the vech will fill
in the diagonal as well as the strictly lower triangle. If diag
is provided (either a number or a vector), then vech is for the
strictly lower triangular part. The default value for lowerOnly
is FALSE, which means that a symmetric matrix will be created. See
examples for a demonstration of how to fill in the lower triangle
and leave the diagonal and the upper triangle empty.

A collection of functions for interpretation and presentation
of regression analysis. These functions are used
to produce the statistics lectures in
<https://pj.freefaculty.org/guides/>. Includes regression
diagnostics, regression tables, and plots of interactions and
"moderator" variables. The emphasis is on "mean-centered" and
"residual-centered" predictors. The vignette 'rockchalk' offers a
fairly comprehensive overview. The vignette 'Rstyle' has advice
about coding in R. The package title 'rockchalk' refers to our
school motto, 'Rock Chalk Jayhawk, Go K.U.'.

Paul Johnson

rockchalk

Regression Estimation and Presentation

Paul E. Johnson

Gabor Grothendieck

Dimitri Papadopoulos OrfanosGabor

vech2mat function

<dl><dt>vech</dt>
<dd>A vector</dd>
<dt>diag</dt>
<dd>Optional. A single value or a vector for the
diagonal. A vech is a strictly lower triangluar vech, it
does not include diagonal values. diag can be either a single
value (to replace all elements along the diagonal) or a vector of
the correct length to replace the diagonal.</dd>
<dt>lowerOnly</dt>
<dd>Default = FALSE.</dd></dl>

Arguments

Convert a half-vector (vech) into a matrix. — vech2mat

<dl>

<dt>vech</dt>
<dd>A vector</dd>


<dt>diag</dt>
<dd>Optional. A single value or a vector for the
diagonal. A vech is a strictly lower triangluar vech, it
does not include diagonal values. diag can be either a single
value (to replace all elements along the diagonal) or a vector of
the correct length to replace the diagonal.</dd>


<dt>lowerOnly</dt>
<dd>Default = FALSE.</dd>

</dl>

vech2mat: Convert a half-vector (vech) into a matrix.

Description

Usage

Arguments

See Also

Examples