Add marginal plots on ggpubr plots:

Perfect Scatter Plots with Correlation and Marginal Histograms http://www.sthda.com/english/articles/24-ggpubr-publication-ready-plots/78-perfect-scatter-plots-with-correlation-and-marginal-histograms/

see also ggMarginal from </em> ggExtra package

https://github.com/daattali/ggExtra