Test for symmetric numeric matrix
This function returns TRUE if the argument is a numeric symmetric square matrix and FALSE otherwise.
is.symmetric.matrix(x)
x |
an R object |
TRUE or FALSE.
If the argument is not a numeric matrix, the function displays an error message and stops. If the argument is not a square matrix, the function displays an error message and stops.
Frederick Novomestky fnovomes@poly.edu
Bellman, R. (1987). Matrix Analysis, Second edition, Classics in Applied Mathematics, Society for Industrial and Applied Mathematics.
A <- matrix( c( 1, 2, 3, 4 ), nrow=2, byrow=TRUE ) is.symmetric.matrix( A ) B <- matrix( c( 1, 2, 2, 1 ), nrow=2, byrow=TRUE ) is.symmetric.matrix( B )
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