Exclude when sd=0
On May 23, 2012, at 8:44 PM, Chris Burns wrote:
How do I trim a matrix to exclude columns that have no standard deviation?
mtx[ , as.logical(apply(mtx, 2, sd))]
David Winsemius, MD West Hartford, CT
How do I trim a matrix to exclude columns that have no standard deviation?
mtx[ , as.logical(apply(mtx, 2, sd))]
David Winsemius, MD West Hartford, CT