I'm trying to put the rows of one matrix in the same order as the rows of another matrix of the same dimension. However I can't quite figure out how to do this without an explicit loop. It seems I should be able to do this with subsetting and an apply or Map function, but I can't figure out how to do it.
Here's a toy example:
sortMe <- matrix(rnorm(6), ncol=2)
sortBy <- matrix(c(2,1,3, 1,3,2), ncol=2)
sorted <- sortMe
for (i in 1:ncol(sortMe)) {
sorted[,i] <- sortMe[,i][sortBy[,i]]
}
Using this method, the resulting sorted
matrix contains the values from sortMe
sorted in the same order as the sortBy
matrix. Any idea how I'd do this without the loop?
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