Symmetric Matrix
Create a Symmetric Matrix.
symMatrix( data = NA, nrow = NULL, byrow = FALSE, upper = FALSE )
data |
an optional data vector. |
nrow |
the desired number of rows and columns. |
byrow |
logical. If 'FALSE' (the default) the matrix is filled by columns, otherwise the matrix is filled by rows. |
upper |
logical. If 'FALSE' (the default) the lower triangular part of the matrix (including the diagonal) is filled, otherwise the upper triangular part of the matrix is filled. |
a symmetric matrix.
Arne Henningsen
# fill the lower triangular part by columns symMatrix( 1:10, 4 ) # fill the upper triangular part by columns symMatrix( 1:10, 4, upper = TRUE ) # fill the lower triangular part by rows symMatrix( 1:10, 4, byrow = FALSE )
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