plotPNG {shiny} | R Documentation |
The PNG graphics device used is determined in the following order:
If the ragg package is installed (and the shiny.useragg
is not
set to FALSE
), then use ragg::agg_png()
.
If a quartz device is available (i.e., capabilities("aqua")
is
TRUE
), then use png(type = "quartz")
.
If the Cairo package is installed (and the shiny.usecairo
option
is not set to FALSE
), then use Cairo::CairoPNG()
.
Otherwise, use grDevices::png()
. In this case, Linux and Windows
may not antialias some point shapes, resulting in poor quality output.
plotPNG( func, filename = tempfile(fileext = ".png"), width = 400, height = 400, res = 72, ... )
func |
A function that generates a plot. |
filename |
The name of the output file. Defaults to a temp file with
extension |
width |
Width in pixels. |
height |
Height in pixels. |
res |
Resolution in pixels per inch. This value is passed to the graphics device. 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 the graphics device. These can be used to set the width, height, background color, etc. |
A NULL
value provided to width
or height
is ignored (i.e., the
default width
or height
of the graphics device is used).
A path to the newly generated PNG file.