[R] mean and sd with number of values?

[Erik Iverson]

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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