ggplot2 each group consists of only one observation

Question

I am trying to plot the graph using ggplot2

So I have the following dataframe:

   iter        se perf name
1    V1 0.6463573 12.8    e
2    V2 0.3265         


        

Answer 1

check whether the data type is factor by using is.factor(x), if it is TRUE, then use as.integer function.