Hello, I am trying to pass a conditional expression into an expression to be evaluated when ever an R statement is called. For example:
get_unique_count <- function(df, select, field){ uniqs <- unique(subset(df, select)[field]) return (nrow(uniqs)) } In this case select is a conditional statement year == 1980, and the function would be called in the following manner: library(ggplot2) get_unique_count(mpg, year==1980, 'manufacturer') Thank for any help in advance, -- Adam ______________________________________________ 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.