dmult | R Documentation |
Fast multiplication of a diagonal matrix by another matrix, taking taking advantage of the properties of diagonal matrices.
dmult(matrix1, matrix2)
matrix1 |
A diagonal matrix. |
matrix2 |
An ordinary matrix. |
dmult()
will turn matrix1
into a vector and multiply it
horizontally by every rows in matrix2
. This saves precious computing
time.\
The number of rows and columns of the diagonal matrix1
must be
equal to the number of rows of matrix1
.
Product of matrix1 and matrix2.
multd()
.
wio <- make_wio("wiodtest")
dmult(wio$W, wio$Bd)
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