關於

Question

我已經創建了下面的函數等內ggplot冠軍，

create_plot <- function(variable) { 
return(qplot(data = white_wine, x = variable ,color =I('black'),fill = 
     qual_factor))+ 
     ggtitle('Distribution of quality with respect to _______')} 

下面我打電話有兩個不同的變量的函數：

create_plot(white_wine$total.sulfur.dioxide) 

create_plot(white_wine$density) 

我在ggtitle語法把「_______」 ，因爲我想要我調用的任何變量的名稱。

例如，

'enter code hereDistribution of quality with respect to total.sulfur.dioxide' when 
    white_wine$total.sulfur.dioxide is called, and ,'Distribution of quality with respect to density' when white_wine$density is called. 

Answer 1

也許你可以使用你的函數調用另一種說法？

create_plot <- function(variable, title) { 
return(qplot(data = white_wine, x = variable ,color =I('black'),fill = 
     qual_factor))+ 
     ggtitle(paste0('Distribution of quality with respect to ', title))} 

create_plot(white_wine$total.sulfur.dioxide, 'total sulfure dioxine') 

create_plot(white_wine$density, 'density')