calculating std err (SEM)?
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 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
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