[R] Problem with NA data when computing standard error

LeCzar sirnixu at gmail.com
Tue Apr 8 19:44:14 CEST 2008


I want to compute means and standard errors as two tables like this:


Part of the data is labeled as NA, therfore the na.rm=T. I succeed in
creating the table for the means, but not for the standard errors. The
message is "Error in FUN(X[[1L]], ...) : unused argument(s) (na.rm = TRUE)". 
Does anyone have an idea how to get the standard error computed?


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