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

From: Jorge Iván Vélez <jorgeivanvelez_at_gmail.com>
Date: Thu, 06 Mar 2008 11:46:11 -0500

Hi Martin,

Try

x=c(NA,NA,rnorm(50),NA)
sum(!is.na(x))

HTH Jorge

On Thu, Mar 6, 2008 at 11:41 AM, Martin Kaffanke <technik_at_roomandspace.com> 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
>
> --
> Ihr Partner für Webdesign, Webapplikationen und Webspace.
>
http://www.roomandspace.com/
> Martin Kaffanke +43 650 4514224
>
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