[R] calculating std err (SEM)?

[Andrew Perrin]

try sd(x)

ap

----------------------------------------------------------------------
Andrew J Perrin - andrew_perrin at unc.edu - http://www.unc.edu/~aperrin
 Assistant Professor of Sociology, U of North Carolina, Chapel Hill
      269 Hamilton Hall, CB#3210, Chapel Hill, NC 27599-3210 USA


On 1 Mar 2002, Kirk R. Wythers wrote:

> Is there a "canned" function in R for finding the standard error of the
> mean? I have tried 
> 
> >  sem <- function(x) c(mean =mean(x),
> +  SEM = stdev(x)/sqrt(length(x)))
> > sem(pnet.lai)
> Error in sem(pnet.lai) : couldn't find function "stdev"
> 
> 
> It looks like there is no stdev function in R
> 
> Thanks,
> 
> Kirk
> 
> 
> 
> Kirk R. Wythers				email: kwythers at umn.edu
> University of Minnesota			tel: 612.625.2261
> Department of Forest Resources		fax: 612.625.5212
> Saint Paul, MN 55108
> 					
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