symMat

Creates a square symmetric matrix from a vector.

A collection of matrix functions for teaching and learning matrix
linear algebra as used in multivariate statistical methods. These functions are
mainly for tutorial purposes in learning matrix algebra ideas using R. In some
cases, functions are provided for concepts available elsewhere in R, but where
the function call or name is not obvious. In other cases, functions are provided
to show or demonstrate an algorithm. In addition, a collection of functions are
provided for drawing vector diagrams in 2D and 3D.

Michael Friendly

matlib

Matrix Functions for Teaching and Learning Linear Algebra and
Multivariate Statistics

John Fox

Phil Chalmers

Georges Monette

Gaston Sanchez

symMat function

<dl><dt>x</dt>
<dd>A numeric vector used to fill the upper or lower triangle of the matrix.</dd>
<dt>diag</dt>
<dd>Logical. If <code>TRUE</code> (the default), the diagonals of the created matrix are replaced
by elements of x; otherwise, the diagonals of the created matrix are replaced by "1".</dd>
<dt>byrow</dt>
<dd>Logical. If <code>FALSE</code> (the default), the created matrix is filled by columns;
otherwise, the matrix is filled by rows.</dd>
<dt>names</dt>
<dd>Either a logical or a character vector of names for the rows and columns of the matrix.
If <code>FALSE</code>, no names are assigned; if <code>TRUE</code>, rows and columns are named
<code>X1</code>, <code>X2</code>, ... .</dd></dl>

Arguments

Originally from <code>metaSEM::vec2symMat</code>, Mike W.-L. Cheung &lt;mikewlcheung@nus.edu.sg&gt;; modified by Michael Friendly

Author

Create a Symmetric Matrix from a Vector — symMat

<dl>

<dt>x</dt>
<dd>A numeric vector used to fill the upper or lower triangle of the matrix.</dd>


<dt>diag</dt>
<dd>Logical. If <code>TRUE</code> (the default), the diagonals of the created matrix are replaced
by elements of x; otherwise, the diagonals of the created matrix are replaced by "1".</dd>


<dt>byrow</dt>
<dd>Logical. If <code>FALSE</code> (the default), the created matrix is filled by columns;
otherwise, the matrix is filled by rows.</dd>


<dt>names</dt>
<dd>Either a logical or a character vector of names for the rows and columns of the matrix.
If <code>FALSE</code>, no names are assigned; if <code>TRUE</code>, rows and columns are named
<code>X1</code>, <code>X2</code>, ... .</dd>

</dl>

symMat: Create a Symmetric Matrix from a Vector

Description

Usage

Value

Arguments

Author

Examples