On 27/05/15 23:37, Thierry Onkelinx wrote:
Dear Glenn,Suppose this function test <- function(df){ ggplot(df, aes(x = gp, y = y)) + geom_point() } Then R CMD check will consider gp and y as global variables since they are undefined. Because R CMD check cannot detect that gp and y will be extracted from df by ggplot2. Possible workarounds # now gp and y are defined within the function. ggplot2 still looks for gp and y in df. test <- function(df){ gp <- NULL y <- NULL ggplot(df, aes(x = gp, y = y)) + geom_point() } # now "gp" and "y" are strings and hence defined test <- function(df){ ggplot(df, aes_string(x = "gp", y = "y")) + geom_point() }
<SNIP> Why not use utils::globalVariables? cheers, Rolf Turner -- Technical Editor ANZJS Department of Statistics University of Auckland Phone: +64-9-373-7599 ext. 88276 ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
