variables in package function didn't work properly with {{}}

[gaospecial]

I have wrote three functions as according to the official guidelines in Using ggplot2 in packages.

#' @importFrom ggplot2 ggplot geom_boxplot aes
myplot1 = function(data, x = "group", y = "weight"){
  ggplot(data, aes({{ x }}, {{ y }})) +
    geom_boxplot()
}

#' @importFrom ggplot2 ggplot geom_boxplot aes_string
myplot2 = function(data, x = "group", y = "weight"){
  ggplot(data, aes_string(x, y)) +
    geom_boxplot()
}

#' @importFrom ggplot2 ggplot geom_boxplot aes
#' @importFrom rlang .data
myplot3 = function(data, x = "group", y = "weight"){
  ggplot(data, aes(.data[[x]], .data[[y]])) +
    geom_boxplot()
}

All these functions are designed to have identical results. However, they don't.

data("PlantGrowth")
myplot1(PlantGrowth)
myplot2(PlantGrowth)
myplot3(PlantGrowth)

I'am wondering whether I am wrong with coding of myplot1(). Please give me some feedback.

[thomasp85]

In the first case you are passing in strings which makes the call equivalent to

ggplot(data, aes("group", "weight")) +
    geom_boxplot()

which is not correct code

You should not pass in the aesthetics as strings but as unquoted expressions (i.e. how you would write them inside aes())

[gaospecial]

In the first case you are passing in strings which makes the call equivalent to

ggplot(data, aes("group", "weight")) +
    geom_boxplot()

which is not correct code

You should not pass in the aesthetics as strings but as unquoted expressions (i.e. how you would write them inside aes())

Yes, you are right. myplot1(PlantGrowth, x = group, y = weight) works for me.

Thanks for your immediate response!