r - how to print unit of the feature on plot using function? -


i have function creating plots in r. wish print unit along feature name. below code.

library(ggplot2) plotfunction <- function(feature, featur_name, feature_unit){   ggplot(aes(x = feature), data = mtcars) +     geom_histogram(binwidth = 0.5) +     labs(x = paste(featur_name, feature_unit), y = "count, #")  }  plotfunction(mtcars$wt, "displacement, ", expression({g}/{dm}^{3}))

the function produces plot as shown below.

enter image description here

not graceful solution, here goes:

plotfunction2 <- function(feature_name, feature_unit){    x.lab = paste0("expression(paste('", feature_name, "', ", feature_unit, "))")    ggplot(data = mtcars, aes(wt)) +      geom_histogram(binwidth = 0.5) +     labs(x = eval(parse(text = x.lab))) }  plotfunction2("displacement, ", "{g}/{dm}^{3}")

plot

(i left first argument out because data input isn't part of real question here... though shouldn't define aesthetic mapping $ sign.)


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