![]() ![]() 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)) + Type ?tiff for additional information.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(). This argument will be ignored if type = "quartz". ![]() Other options are "rle", "lzw", "jpeg", "zip", "lzw+p" and "zip+p". ![]() This function allows you to set the compression type, which defaults to "none", with the compression argument. Last, you can save a plot to TIFF (Tagged Image File Format) with the tiff function. Third, you can save a plot to BMP (Windows bitmap) with the bmp function. Second, for saving plots in JPEG, you can use the jpeg function, which also allows you to set the quality of the image as percentage with the quality argument (75% by default). This image file format is known to weight less than JPEG with better quality, as it supports transparent backgrounds. If you set the graphic device to a high-resolution ( res = 200), you will need to modify height and width of the corresponding function and the margins of your plot with the par function in order to avoid losing the original formatting and layout.įirst, the png function allows you to save an image to a Portable Network Graphics file. Note that you can convert inches to centimeters dividing by 2.54. Width = 8, height = 7, # Width and height in inchesĬolormodel = "cmyk" # Color model (cmyk is required for most publications) You can also change the width and height (in inches) of the output plot, the paper and point size, or modify the background color, as the PDF plot will have a transparent background, or the color model, among other graphical parameters. ![]() However, if you need to edit the image after saving in order to add some decoration or perform some modifications you should use SVG.įirst, in order to save a plot as PDF in R you will need to open the graphics device with the pdf function, create the plot you desire and finally, close the opened device with the dev.off function. The PDF format for saving images is the most used for creating scientific documents, as they are easy to add to LaTeX and maintain the resolution even if you zoom in. Save plot in R as PDF, SVG or postscript (PS) ![]()
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