Capture a plot as a saved file
Easily generates a .png file (or other graphics file) from a plotting expression.
capturePlot( expr, filename = tempfile(fileext = ".png"), device = defaultPngDevice(), width = 400, height = 400, res = 72, ... )
expr |
A plotting expression that generates a plot (or yields an object
that generates a plot when printed, like a ggplot2). We evaluate this
expression after activating the graphics device ( |
filename |
The output filename. By default, a temp file with |
device |
A graphics device function; by default, this will be either
|
width, height, res, ... |
Additional arguments to the |
plotTag() saves plots as a self-contained <img>
tag.
# Default settings
res <- capturePlot(plot(cars))
# View result
if (interactive()) browseURL(res)
# Clean up
unlink(res)
# Custom width/height
pngpath <- tempfile(fileext = ".png")
capturePlot(plot(pressure), pngpath, width = 800, height = 375)
if (interactive()) browseURL(pngpath)
unlink(pngpath)
# Use a custom graphics device (e.g., SVG)
if (capabilities("cairo")) {
svgpath <- capturePlot(
plot(pressure),
tempfile(fileext = ".svg"),
grDevices::svg,
width = 8, height = 3.75
)
if (interactive()) browseURL(svgpath)
unlink(svgpath)
}Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.