knitr: How to show two plots of different sizes next to each other?

Question

I wanted to generate two images of different sizes, but show them side-by-side. Is this possible?

This works, but then they have to be the same size:

Answer 1

Yet another option is to use a vector for out.width or out.height, if you do not mind resizing the plots, e.g.

```{r out.width=c('500px', '300px'), fig.show='hold'}
boxplot(1:10)
plot(rnorm(10))
```