Re: [R] mean and sd with number of values?

From: Erik Iverson <iverson_at_biostat.wisc.edu>
Date: Thu, 06 Mar 2008 10:51:21 -0600

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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>
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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Thu 06 Mar 2008 - 17:06:42 GMT

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