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

One option would be to make a single wide graph with the R commands and give knitr just the one graph to deal with, maybe something like:

```{r fig.width=10, fig.height=9}
layout( cbind( c(0,0,1,1,1,1,1,0,0), rep(2,9) ) )
plot(...)
plot(...)
```