[R-pkg-devel] Using ggplot2 within another package

Paul SAVARY p@u|@@@v@ry @end|ng |rom un|v-|comte@|r
Thu Apr 22 22:34:33 CEST 2021

Hi Kevin,

I was faced to the same problem and I used 'aes_string()' instead of 'aes()'. You can then just write the name of the columns containing the data to plot as character strings.


myPlot <- function(myData, ...) {
    # get ready
    ggplot(myData, aes_string(x = "myX", y = "myY")) +
       # add my decorations

It is probably already the case for your function but you need to include #' @import ggplot2 in your function preamble (if I am not wrong).

Kind regards

----- Mail original -----
De: "Kevin R. Coombes" <kevin.r.coombes using gmail.com>
À: "r-package-devel" <r-package-devel using r-project.org>
Envoyé: Jeudi 22 Avril 2021 22:28:55
Objet: [R-pkg-devel] Using ggplot2 within another package


I'm trying to help clean up an R package for someone else to submit to 
CRAN. He has used ggplot2 to implement a plotting function for the kinds 
of things that his packages generates. His plotting routine basically 
looks like (after changing names to protect the innocent):

myPlot <- fucntion(myData, ...) {
    # get ready
    ggplot(myData, aes(x = myX, y = myY)) +
       # add my decorations

Of course, "R CMD check --as-cran" complains that there is no global 
binding for "myX" or "myY" since they are columns defined in the 
data.frame "myData".

What is the best way to work around this issue?

Of course, dinosaurs like myself might be tempted to suggest just using 
plain old "plot", so I don't need to see those suggestions.

Do I just ignore the usual ggplot conventions and write "myData$myX" 
inside "aes"  in order to appease the CRAN checker? Or is there some 
tidy-er way to solve this problem?


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