Dear all,
I am trying to calculate the mean of one column for many data frames. The code
I am using is as follows:
> for (i in seq(nrow(index))) {
assign(paste(model, "_mean_",index$year[i], index$month[i], sep=''),
mean(get(paste(model, index$year[i], index$month[i], "[,3]",
sep=''))))
}
Error in get(paste(model, index$year[i], index$month[i], "[,3]", sep = "")) :
object 'cccma207101[,3]' not found
The error message I'm getting is strange, because this object does exist:
str(cccma207101[,3])
num [1:61538] 0.687 2.661 0 0 0 ...
If I leave the "[,3]" out of the loop, the code seems to work fine - so I'm
isolating this as the cause of the problem for now.
My question is therefore, how can I use the above code to extract column three
from each of the (360) data frames?
Many thanks for any help offered,
Steve
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