Abdul Majed Raja shows how to use the cowplot library in R to merge together independent plots into a single image:
The way it works in cowplot is that, we have assign our individual ggplot-plots as an R object (which is by default of type ggplot). These objects are finally used by cowplot to produce a unified single plot.
In the below code, We will build three different histograms using the R’s in-built dataset iris and then assign one by one to an R object. Finally, we will use cowplot function
plot_grid()to combine the two plots of our interest.
The only thing that disappointed me with cowplot is that its name has nothing to do with cattle.