Dear R users:
I'm trying to use "boot" function under the package boot to run some
bootstrapping.
Basically, I have a df as follows. (The data is simplified for illustrative
purpose.)
V1 V2 V3
1 2 3
4 5 7
3 5 2
Say that I want bootrap among (V1,V2,V3) for 1000 times and calculate the
average of them, ie., v_bar still has lenght of 3. I think my question is
really how to write bf function below.
bf <- function(d,f)
{
gp1 <- 1:3 #indicate random draw from three series
dmean <- apply(d[,gp1]*f[gp1],1,mean)
}
a <- boot(df,bf, R=1000, stype="f")
Any help or suggestions? Many thanks.
Yihsu
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