plotPNG: Run a plotting function and save the output as a PNG
Description
This function returns the name of the PNG file that it
generates. In essence, it calls png()
, then
func()
, then dev.off()
. So func
must
be a function that will generate a plot when used this
way.Usage
plotPNG(func, filename = tempfile(fileext = ".png"),
width = 400, height = 400, res = 72, ...)
Arguments
func
A function that generates a plot.
filename
The name of the output file. Defaults to
a temp file with extension .png
.
res
Resolution in pixels per inch. This value is
passed to png
. Note that this affects the
resolution of PNG rendering in R; it won't change the
actual ppi of the browser. ...
Arguments to be passed through to
png
. These can be used to set
the width, height, background color, etc. Details
For output, it will try to use the following devices, in
this order: quartz (via png
),
then CairoPNG
, and finally
png
. This is in order of quality
of output. Notably, plain png
output on Linux and
Windows may not antialias some point shapes, resulting in
poor quality output.