This does not change size of the image in pixels, nor does it affect appearance -- it is lossless compression. This requires GraphicsMagick (recommended) or ImageMagick to be installed.

resize(filename, geometry)



Character vector containing the path of images to resize.


Scaling specification. Can be a percent, as in "50%", or pixel dimensions like "120x120", "120x", or "x120". Any valid ImageMagick geometry specifation can be used. If filename contains multiple images, this can be a vector to specify distinct sizes for each image.


if (interactive()) { # Can be chained with webshot() or appshot() webshot("", "r-small-1.png") %>% resize("75%") # Generate image that is 400 pixels wide webshot("", "r-small-2.png") %>% resize("400x") }