alr3 (version 1.0.3)

random.lin.comb: Compute a random linear combination of the columns of a matrix or data frame

Description

Computes $Xa$ where $X$ is an $n \times p$ matrix, and $a$ is a random vector of length $p$.

Usage

random.lin.comb(X, seed = NULL)

Arguments

X

An $n \times p$ matrix or data frame

seed

If not NULL, use this to initialize the random number generator

Value

• A vector of length $n$.

Details

The matrix $X$ is first scaled and centered. $a$ is computed to have random uniform components on $(-1,1)$.

See Also

pure.error.anova, ~~~

Examples

random.lin.comb(matrix(rnorm(9),ncol=3))