ggfority::autoplot residual plot is tiny

Question

I'm creating residual plots using ggfortify::autoplot(aov_obj, which = 1, colour = ...) in Rmarkdown.

However, the x axis on this plot was really condensed compared to the y axis,

So I used {r, fig.width = 20} in my chunk. This spread out the size of x axis BUT reduced the size of the title and height.

(It might not look that way in this screenshot, but consider in the context of the 1st image. I want it to be that big)

Essentially, all I want to do is either

• Stretch out the x axis on the first image, without making reducing the size of the title or height or axis labels.

• Or make the second image larger in general

Extra things I've tried so far

• fig.height. This just makes the second image longer, but the titles still remain tiny and the width is still tiny no matter how large I set it.

• out.height and out.width. If used by themselves, makes the plot absolutely minuscule no matter how small/large these values are. If used in conjunction with fig.width, doesn't make the graph any larger, can only make it smaller

Any help would be appreciated Here's a sample aov object if people want to do some testing aov_obj = aov(Sepal.Width ~ Petal.Length*Sepal.Length, data = iris)

Thanks