randomLinComb {alr3} | R Documentation |
Computes Xa where X is an n by p matrix, and a is a random vector of length p.
randomLinComb(X, seed = NULL) ## S3 method for class 'lm' randomLinComb(X, seed=NULL)
X |
An n by p matrix or data frame. For the lm
method, X is a linear regression model, and |
seed |
If not NULL, use this to initialize the random number generator |
The matrix X is first scaled and centered. a is computed to have random uniform components on (-1,1).
A vector of length n.
Sanford Weisberg, sandy@stat.umn.edu
randomLinComb(matrix(rnorm(9),ncol=3))