error: RAW() can only be applied to a 'raw', not a 'character'

[cdkodira]

Any idea why I am getting this error?

cols <- order(apply(hnscc$Y,2,sd),decreasing = TRUE)
Error in derive_pubkey(key) :
RAW() can only be applied to a 'raw', not a 'character'

[pcarbo]

@cdkodira Y is a sparse matrix, so it doesn't work with apply(). For your specific task, you could use instead for example colSds() from the sparseMatrixStats package.