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

For subdividing the plots:

plot(fit1,parm=1:2)
plot(fit1,parm=3)

Note that you could have found the answer by careful reading of ?plot.summary.rqs, but this may not have been obvious: in order to know where to look you would need to do class(fit1) to figure out which plot method was being used.

Roman's answer takes care of the image dimension stuff.

Answer 2

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.