copy: Copies a vector into a matrix
In lsr: Companion to "Learning Statistics with R"

Description Usage Arguments Details Value Examples

Copies a vector into a matrix

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colCopy(x, times, dimnames = NULL)

rowCopy(x, times, dimnames = NULL)

`x`	The vector to be copied
`times`	Number of copies of the vector to bind together
`dimnames`	List specifying row and column names

This is a convenience function for binding together multiple copies of the same vector. The intended usage is for situations where one might ordinarily use rbind or cbind, but the work is done by the matrix function. Instead of needing to input multiple copies of the input vector x (as one would for rbind), one only needs to specify the number of times that the vector should be copied.

For rowCopy, the output is a matrix with times rows and length(x) columns, in which each row contains the vector x. For colCopy, each column corresponds to the vector x.

#Example 1: basic usage
data <- c(3,1,4,1,5)
rowCopy( data, 4 )
colCopy( data, 4 )

#Example 2: attach dimension names
dnames <- list( rows = c("r1","r2","r3"), cols = c("c1","c2","c3","c4","c5") )
rowCopy( data,3,dnames )