ggsave() only saves single plot from ggpairs grid

[naught101]

Pretty self explanitory:

ggpairs(iris, colour='Species', alpha=0.4)
ggsave("/tmp/iris_pairs.png")

Only plots a basically empty graph (one of the diagonals - no data, just labels). Would be good if it plotted the whole grid.

[wch]

Sorry, ggsave just won't work in this situation, since it only saves the last ggplot object, and ggpairs creates many ggplot objects. You can still use pdf() or png() to save the image.

[naught101]

Ok, thanks.

For others in this situation, dev.copy2pdf() also works retrospectively, although it certainly isn't as nice as ggsave.

grid.arrange() plots also have this problem.

[mhils]

A little bit late to the party, but if you need SVG output, you can use

svg("filename.svg",height=8,width=8)
ggpairs(data) 
dev.off()

Cheers,
Max

[thvasilo]

For future reference here is a small function that creates and saves a ggpairs plot to a png file

createCorrelationPlots <- function(path, filename, df) {
  corrPlot <- ggpairs(
    df, diag=list(continuous="density"), axisLabels='show')
  png(file.path(path, filename), height=1000, width=1000)
  print(corrPlot)
  dev.off()
}

Notice the explicit call print(corrPlot).
Feel free to change png to pdf or whatever output you want, check Table 1.1 here for available formats.