is.diagonal.matrix

This function returns <code>TRUE</code> if the given matrix argument x
 is a square numeric matrix and that the off-diagonal elements are close
 to zero in absolute value to within the given tolerance level. Otherwise,
 a <code>FALSE</code> value is returned.

 math

A collection of functions to support matrix calculations
for probability, econometric and numerical analysis. There are
additional functions that are comparable to APL functions which
are useful for actuarial models such as pension mathematics.
This package is used for teaching and research purposes at the
Department of Finance and Risk Engineering, New York
University, Polytechnic Institute, Brooklyn, NY 11201.
Horn, R.A. (1990) Matrix Analysis. ISBN 978-0521386326.
Lancaster, P. (1969) Theory of Matrices. ISBN 978-0124355507.
Lay, D.C. (1995) Linear Algebra: And Its Applications. ISBN 978-0201845563.

S. Thomas Kelly

matrixcalc

Collection of Functions for Matrix Calculations

is.diagonal.matrix function

<dl> <dt>x</dt>
<dd>a numeric square matrix</dd> <dt>tol</dt>
<dd>a numeric tolerance level usually left out</dd></dl>

Arguments

Frederick Novomestky <a href="/link/fnovomes%40poly.edu?package=matrixcalc&version=1.0-6" data-mini-rdoc="matrixcalc::fnovomes@poly.edu">fnovomes@poly.edu</a>

Author

Test for diagonal square matrix — is.diagonal.matrix

<dl>

 <dt>x</dt>
<dd>a numeric square matrix</dd>

 <dt>tol</dt>
<dd>a numeric tolerance level usually left out</dd>

</dl>

Frederick Novomestky <a href='mailto:fnovomes@poly.edu'>fnovomes@poly.edu</a>

is.diagonal.matrix: Test for diagonal square matrix

Description

Usage

Value

Arguments

Author

References

Examples