Displaying 1 result from an estimated 1 matches for "rowsperobs".
2008 Jan 20
2
Efficient way for multiplying vectors with a only certain number of rows in a matrix
Dear R-users,
I am working on a problem that I am currently not able to solve efficiently.
It is about multiplying one column of a matrix with only a certain number of
rows of another matrix.
Let me illustrate my problem with an example:
n.obs = 800
n.rowsperobs = 300
n.param = 23
Designmat = matrix(rnorm(n.obs*n.rowsperobs*n.param),ncol=n.param)
Betamat = matrix(rnorm(n.obs*n.param),nrow=n.param)
In this example, "Designmat" consists of 800*300 rows, meaning that 300 rows
belong to one of the 800 observations.
Each observation has also one p...