How to resize and save plots in png format?

Question

I would like to plot the results from a quantile regression, but am not able to:

1. control the dimensions/size of the plots and
2. save the plots as png.

Answer 1

You can control the image dimensions by png argument.

png("image.png", width = 800, height = 600)
plot(...)
dev.off()

To "finish" the image, use dev.off.