An R Notebook showing the difference in plotting ggplots and ggassemblies

ggplot_vs_patchwork.rmd

---
title: "R Notebook"
output: html_notebook
---

# Difference in behavior between ggplot2 and patchwork plots in Notebooks

Consider the following ggplot

```{r}
library(ggplot2)
library(patchwork)
p <- ggplot(mtcars) + geom_point(aes(mpg, disp))
```

When plotting this we get, as expected, a single plot

```{r}
p
```

however, if we combine two ggplots with patchwork and displays it in a notebook
well get an additional empty plot

```{r}
p + p
```

looking at the source code for the two plotting functions it seems the grid 
calls are identical...

```{r}
ggplot2:::print.ggplot
```

```{r}
patchwork:::print.ggassemble
```