Aesthetics must either be length one, or the same length as the dataProblems

Question

I would like to make a plot with X values as a subset of the measurement and Y-values as another subset of the measured data.

In the example as below, I have 4 produ

Answer 1

I encountered this problem because the dataset was filtered wrongly and the resultant data frame was empty. Even the following caused the error to show:

ggplot(df, aes(x="", y = y, fill=grp))

because df was empty.