Hi chipmaney,
Here is a suggestion:
with(data, tapply(value, group, function(x) sd(x)/sqrt( length(x) ) ) )
* sqrt(fc$fc)
BTW, take a look at
require(fortunes)
fortune('dog')
HTH,
Jorge
On Tue, Sep 29, 2009 at 6:29 PM, chipmaney <> wrote:
>
> #I have these data. Basically, I want to run a ta
#I have these data. Basically, I want to run a tapply to calculate the mean
and st. err. by factor.
#The problem is, I want to add a finite correction to the variance prior to
calculating the standard error.
#Now I know I could just do this in 3/4 steps by calculating the var,
applying the correct
2 matches
Mail list logo
