1. Please read and follow the Posting Guide linked below. Among other things, it says:
"For questions about functions in standard packages distributed with R (see the FAQ Add-on packages in R), ask questions on R-help." [The link is: https://cran.r-project.org/doc/FAQ/R-FAQ.html#Add-on-packages-in-R This gives the list of current _standard_ packages] "If the question relates to a contributed package [ggplot is such a package] , e.g., one downloaded from CRAN, try contacting the package maintainer first. You can also use find("functionname") and packageDescription("packagename") to find this information. Only send such questions to R-help or R-devel if you get no reply or need further assistance. This applies to both requests for help and to bug reports." Note that RStudio maintains its own help resources at: https://community.rstudio.com/ This is where questions about the TidyVerse, ggplot, etc. should be posted. Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Thu, Dec 30, 2021 at 10:43 AM Kai Yang via R-help <r-help@r-project.org> wrote: > > Hi R team, > I can create a plot using the code below: > library(ggplot2) > library(dplyr) > mpg %>% > filter(hwy <35) %>% > ggplot(aes(x = displ, y = hwy, color = cyl)) + > geom_point() > ggsave("c:/temp/hwy_cyl.jpg",width = 9, height = 6, dpi = 1200, units = "in") > > > I want to do the exactly same work using function. Below is the function I > created: > plot1 <- function(y, c, f){ > mpg %>% > filter(hwy <35) %>% > ggplot(aes(x = displ, y = mpg[[y]], color = mpg[[c]] )) + > geom_point() > ggsave(paste0("c:/temp/", f ,".jpg"), width = 9, height = 6, dpi = > 1200, units = "in") > } > plot1("hwy","cyl","hwy_cyl_f") > > But I got error message when I run the code: "Aesthetics must be either > length 1 or the same as the data (226): y and colour" . I checked online > about the message. My understanding is: I need to add "fill" in geom_point() > statement. My questions are: > 1. is it possible to make the code work without add 'fill' in geom_point() > statement, but keep the color as same as the first code? > 2. if I must add 'fill' option in geom_point() statement, how to add them in? > Should I add 266 colors name after 'fill'? > 3. this is my first function in R, I'm sure there are many problems in the > code. please point out my error in the code. > > > Thank you, > Kai > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. ______________________________________________ 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.
