mean and sd with number of values?
Martin - Does the following help? sapply(fl, function(x) sum(!is.na(x))) See ?sapply Best, Erik Iverson
Martin Kaffanke wrote:
Hi there, When i do mean(fl[1:20], na.rm=T) sd(fl[1:20], na.rm=T) I get 20 Results, but now I'd like to know from how many numbers my mean and sd are calculated. How to I use the length() for this, or is this possible? Because there are missing values in some, but not in all columns. So there should be a different count of numbers. Thanks, Martin ------------------------------------------------------------------------
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