R: Save Cairo X11 Plot to File

savePlot {grDevices}

R Documentation

Save Cairo X11 Plot to File

Description

Save the current page of a cairo X11() device to a file.

Usage

savePlot(filename = paste("Rplot", type, sep="."),
         type = c("png", "jpeg", "tiff", "bmp"),
         device = dev.cur())

Arguments

`filename`	filename to save to.
`type`	file type: only `"png"` will be accepted for cairo version 1.0.
`device`	the device to save from.

Details

Only X11 devices of types "cairo" and "nbcairo" are supported.

This works by copying the image surface to a file. For PNG will always be a 24-bit per pixel PNG ‘DirectClass’ file, for JPEG the quality is 75% and for TIFF there is no compression.

At present the plot is saved after rendering onto the canvas (default opaque white), so for the default bg = "transparent" the effective background colour is the canvas colour.

Value

Invisible NULL.

Note

There is a similar function of the same name but fewer types for cairo-based X11 devices on Unix-alikes