scaleMargins {wordspace} | R Documentation |
Scale Rows and/or Columns of a Matrix (wordspace)
Description
This function provides a fast and memory-efficient way to scale the rows and/or columns
of a dense or sparse matrix. Each row is multiplied with the corresponding element of
the vector rows
, each column with the corresponding element of the vector cols
.
Usage
scaleMargins(M, rows=NULL, cols=NULL, duplicate=TRUE)
Arguments
M |
a dense or sparse matrix in canonical format |
rows |
a numeric vector with length equal to the number of rows of M, or a single number.
If missing or |
cols |
a numeric vector with length equal to the number of columns of M, or a single number.
If missing or |
duplicate |
if |
Details
If M
is not in canonical format (dense numeric matrix or sparse matrix of class dgCMatrix
),
it will automatically be converted. In this case, the precise behaviour of duplicate=FALSE
is undefined.
duplicate=FALSE
is intended for internal use only.
Value
The rescaled dense or sparse matrix.
Author(s)
Stephanie Evert (https://purl.org/stephanie.evert)
See Also
Examples
M <- matrix(1, 5, 3)
scaleMargins(M, rows=1:5, cols=c(1, 10, 100))