指定绘图的宽度和高度

Question

I have a panel containing three plots. How can I use par to specify the width and height of the main panel so it is always at a fixed size?

Answer 1

You do that in the device, eg

x11(width=4, height=6)

and similarly for the file-based ones

pdf("/tmp/foo.pdf", width=4, height=6)

You can read the physical size via par("cin") etc but not set it.

Answer 2

I usually set this at the start of my session with windows.options :

windows.options(width=10, height=10)

# plot away
plot(...)

If you need to reset to "factory settings":

dev.off()
windows.options(reset=TRUE)

# more plotting
plot(...)

Answer 3

Neither solution works in Jupyter notebooks . Here is a general approach that works in any environment:

options(repr.plot.width=6, repr.plot.height=4)

Just keep the following function handy:

set_plot_dimensions <- function(width_choice, height_choice) {
        options(repr.plot.width=width_choice, repr.plot.height=height_choice)
        }

EXAMPLE

Data

 x <-  c(37.50,46.79,48.30,46.04,43.40,39.25,38.49,49.51,40.38,36.98,40.00,38.49,37.74,47.92,44.53,44.91,44.91,40.00,41.51,47.92,36.98,43.40)

Call function with dimensions, and draw plot:

set_plot_dimensions(6, 4)
show_distribution(x, 'test vector')

set_plot_dimensions(16, 4)
show_distribution(x, 'test vector')