Dear list, I would like to calculate the trimmed mean for some subsets within a data.frame (data). The list has already been very helpful, and I have managed calculating the standard mean for the "Intensity" column based on the "Name" column using
> avgs <-aggregate(data$Intensity, by = list(data$Name), mean) but I cannot include the argument trim to mean() > avgs <-aggregate(data$Intensidad, by = list(data$Name), mean (trim=0.1)) Error in mean.default(trim = 0.1) : argument "x" is missing, with no default > avgs <-aggregate(data$Intensity, by = list(data$Name), mean (data$Intensity, trim=0.1)) Error in FUN(X[[1]], ...) : argument "INDEX" is missing, with no default What is the "INDEX" argument I am missing? Thanks in advance, David ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
