ggplot using column names using the tidy evaluation pronoun .data fails

[Sophie2]

I'm struggling to call dataframe columns using strings for ggplot 3.3.6. The code does not generate any error message, just the pdf file is empty.

input data is N x M dataframe, N is the number of subjects, M has columns such as "age", "height", "weight", etc.

fscatter <- function(input, x, y){
  pdf(filen, width=10, height=10)
  ggplot(input, aes(x = .data[[x]], y = .data[[y]]))  + 
    geom_point() + 
    geom_smooth(formula = y ~ x, method=lm) + 
    theme1
  dev.off()
}

fscatter(df,"age","height")

any idea?

[FJCC]

Maybe

fscatter <- function(input, x, y){
  pdf(filen, width=10, height=10)
  ggplot(input, aes_string(x = x, y = y))  + 
    geom_point() + 
    geom_smooth(formula = y ~ x, method=lm) + 
    theme1
  dev.off()
}

fscatter(df,"age","height")

[Flm]

I suggest you use ggsave()

fscatter <- function(input, x, y){
  ggplot(input, aes(x = .data[[x]], y = .data[[y]]))  + 
    geom_point() + 
    geom_smooth(formula = y ~ x, method=lm) + 
    theme1
}

fscatter(df,"age","height")

ggsave("plot.pdf", width = 10, height = 10)