Figure size in R Markdown

Question

I tried to be careful and thorough, to read various things on the net on how to format figures in R Markdown. They are plotted correctly, but it seems that their size cannot

Answer 1

It seems to me like you want Fig2 to be the same size as a single panel in Fig1. If you really want them to be the same size, I'd suggest using the same fig.width and same value for mfrow.

```{r Fig1, echo=TRUE, fig.height=5, fig.width=15}
x1 = rnorm(100)
x2 = runif(100)
x3 = rbeta(100, 1, 1,)
par(mfrow=c(1,3), mar=c(4,4,4,1), oma=c(0.5,0.5,0.5,0))
qqnorm(x1)
qqnorm(x2)
qqnorm(x3)
```

```{r Fig2, echo=TRUE, fig.height=5, fig.width=15}
par(mfrow=c(1,3), mar=c(4,4,4,1), oma=c(0.5,0.5,0.5,0)) # same, could omit
plot.new()   # empty plot
qqnorm(x1)
plot.new()   # empty plot
```

And if you mean you want Fig2 to take up the same amount of space on the rendered document as Fig1 then try this where par(op) resets the plotting parameters.

```{r Fig1, echo=TRUE, fig.height=5, fig.width=15}
x1 = rnorm(100)
x2 = runif(100)
x3 = rbeta(100, 1, 1,)
op <- par(mfrow=c(1,3), mar=c(4,4,4,1), oma=c(0.5,0.5,0.5,0))
qqnorm(x1)
qqnorm(x2)
qqnorm(x3)
par(op)
```

```{r Fig2, echo=TRUE, fig.height=5, fig.width=15}
op <- par(mfrow=c(1,1), mar=c(4,4,4,1), oma=c(0.5,0.5,0.5,0))
qqnorm(x1)
par(op)
```