Save a plot
It is useful to save R graphics with code, so the file creation and naming can be automated.
On a mac, hitting Cmd-S when a graph is displayed will save a pdf. However exporting to pdf (or other formats) using code gives more control. For example Cmd-S will save to the displayed dimensions of a canvas, which is a problem if a canvas contains many graphs because they may not b resolved well. A larger canvas can be defined for export.
pdf(file='1.pdf', width=15, height=18, pointsize=20)
par(mfrow=c(4,4)) #define columns and rows on canvas, each gets a graph
# code for graphs goes here
dev.off()
There are many more options, explored them with ?pdf
3D graphs are exported using:
rgl.snapshot("/Users/username/Desktop/graphName.png")