将变量或表达式传递给`aes`

Question

我编写了用因子变量绘制条形图的函数.当我运行我的功能时,显示错误消息.eval中的错误(expr,envir,enclos):找不到对象'dset'如何修改我的函数？谢谢!

x1=factor(c("f","m","f","f","m","f","f","m","f","m"))
x2=factor(c("1","2","1","1","1","2","2","2","1","1"))
y1=c(10,11,12,13,14,15,16,17,18,19)
y2=c(10,12,12,13,14,15,15,17,18,19)
y3=c(10,12,12,14,14,15,15,17,18,19)
bbb<- data.frame(x1,x2,y1,y2,y3)


myfunc<-function(dataframe){
  library(ggplot2)
  dset<-dataframe
  for (i in 1:ncol(dset)){
    if (is.factor(dset[,i])==T){
      p3<-ggplot(data=dset, aes(x=dset[,i]))
      p3<-p3+geom_bar(colour='blue',fill='blue')
      print(p3)
    } 
  } 
}

myfunc(dataframe=bbb)

Answer 1

转换为答案,因为它似乎很有用

aes用于评估所提供数据集范围内的未加引号的列名称(dset在您的情况下).dset[, i]不是列名,而是整列,aes不是为了处理而设计的.

幸运的是,您可以解析引用的列名称aes_string.因此,使用

aes_string(x = names(dset)[i])

代替

aes(x = dset[, i])

应该解决你的问题