Hi All

I have a data frame in which there are 4 columns .

Column 1 : name

Column 2-4 : values

I would like to calculate mean/Standard error  of values in column 2-4 and
store them in column 5,6 respectively.



I have done the following but doesn't seem to work

mean_N_SE <-function(x)
{

name <- x[1]
vals <- c(x[2:4])
temp_mean <- mean(vals)
SE <-  sqrt(var(x)/length(x))

}

apply(d,1,mean_N_SE) where d = data frame.


Can someone help me with this.

Thanks!
-Abhi

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