如何在 R 中添加分类变量时合并多列

Question

I'm trying to build a bar plot, and currently my data looks like this:

tree flower shrub 4 4 4 5 3 2 4 1 3

I want the column names to be x-values, and the mean of each column to be represented by a separate bar. I think the best way to get at this would be to change my data so it looks like this:

plant value tree 4 tree 5 tree 4 flower 4 flower 3 flower 1 shrub 4 shrub 2 shrub 3

Does anyone know the best way to go about this? Or have any other suggestions for building a bar plot based on this data?

Answer 1

We can use stack from base R

setNames(stack(df1)[2:1], c('plant', 'value'))