Simple Missing cases Function
On Tue, Apr 19, 2011 at 03:29:08PM +0800, Tim Elwell-Sutton wrote:
Dear all I have written a function to perform a very simple but useful task which I do regularly. It is designed to show how many values are missing from each variable in a data.frame. In its current form it works but is slow because I have used several loops to achieve this simple task.
Oh - and in case you ONLY wnt the number of NAs in each column this
should be pretty efficient:
lapply(foo, function(x){sum(is.na(x))})
cu
Philipp
Dr. Philipp Pagel Lehrstuhl f?r Genomorientierte Bioinformatik Technische Universit?t M?nchen Wissenschaftszentrum Weihenstephan Maximus-von-Imhof-Forum 3 85354 Freising, Germany http://webclu.bio.wzw.tum.de/~pagel/