The file extension can be specified either in the name ( 'plot.pdf') or in the device argument with quotes ( device = 'pdf'), or in both places. When using RStudio Server, cairo is needed to save these plot types at all. When using the Linux command line options, we need to use cairo in order to save plots with semi-transparency (see Alpha Support). tiff, we must specify type = 'cairo' like so: ggsave('plot.png', type = 'cairo'). The SSCC Linux servers can be accessed and used in three ways (click each for details): interactively at the command line, in batch mode at the command line, or with an RStudio interface via RStudio Server. dpi can be specified as a number, but it also accepts “retina” (320 dpi), “print” (300 dpi), and “screen” (72 dpi). When saving PNGs or other non-vectorized image types (see File Extensions below), the resolution can be specified with dpi, dots (printed pixels) per inch.

Ggsave('too-large.png', width = 12, height = 8) ggsave('too-small.png', width = 1.5, height = 1) Geom sizes are specified in millimeters, so saving different plot sizes without adjusting geom sizes can have unintended results where everything is too close or too far apart. Ggsave('plot.pdf', width = 15, height = 10, units = 'cm') ggsave('plot.pdf', width = 6, height = 4) It usually takes a little back-and-forth between selecting dimensions, saving the file, checking the appearance of the saved file, and adjusting the dimensions and geom sizes.īy default, units are specified in inches, but this can be changed. Instead, a better strategy is to specify the dimensions when we save the image. However, this option is not reproducible since it leaves no enduring record.

This allows for us to see how the image will look before we save it. One strategy we could take to size our plots is to adjust the Plots pane. Notice that the result of dev.size() and the message we receive when saving the plot with ggsave() give the same dimensions.

Ggsave('plot.pdf') # Saving 7 x 5 in image dev.size() # 7 5 ggplot(mtcars, aes(x = wt, y = mpg)) + The default size of the saved image is equal to the size of Plots pane (the “graphics device”) in RStudio, which can be found with dev.size().

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