Displaying 2 results from an estimated 2 matches for "betamat2".
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betamat
2000 Dec 06
0
Stepwise Regression
...each iteration step.
What did I do wrong?
I'm using R version 1.1.1 on Windows NT.
(I'm sorry if this is a stupid question but I didn't find the answer in
the help file or the FAQs.)
Thanks in advance for any help.
Martina Erdbr?gge
Here is my code with results:
> lm44 <- lm(betamat2[, 2] ~ 1, data = fndaten, weights = fndaten$varin)
> step(lm44, ~ (A + B + C + D)^4)
Start: AIC= -20.5
betamat2[, 2] ~ 1
Df Sum of Sq RSS AIC
+ C 1 1.3500 2.5706 -25.2555
+ B 1 1.2323 2.6882 -24.5393
<none> 3.9206 -20.5016
+ A 1...
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 =