patchwork will automatically drop the duplicate for you (which can also be used to merge different legend ascetics), similar to why we include thescale_color_discrete(drop = FALSE). I'll achieve this here by setting the limits of the alpha scale to the range of the data including both ...
ggplot2 Error: stat_count() must not be used with a y aesthetic Error – Undefined Columns Selected when Subsetting Data Frame Dealing with Warnings & Errors in R (Cheat Sheet) R Programming Language Summary: You learned in this article how tohandle the error “Aesthetics must be either len...