Saving ggplot object

Asked Apr 23 '18 at 10:32

Active Apr 23 '18 at 22:43

Viewed 27 times

I am using gridExtra to display multiple plots and I found that somehow ggplot objects are not saved properly. Take a look at this simple code:

Working version:

gs <- list()
for(i in 1:4){
  gs[[i]] <- qplot(rnorm(100), geom = "histogram", main = i)
}
grid.arrange(grobs = gs, ncol = 2)

Problem version:

gs <- list()
for(i in 1:4){
  x <- rnorm(100)
  gs[[i]] <- qplot(x, geom = "histogram", main = i)
}
grid.arrange(grobs = gs, ncol = 2)

The second version produces identical plots in my R workspace. The version I am using is ggplot2-v2.2.1 and gridExtra-v2.3

edited Apr 23 '18 at 22:43

aosmith

asked Apr 23 '18 at 10:32

ywx

See some of the explanation [here](https://stackoverflow.com/a/39800861/2461552), as what's happening is `qplot` seems related. You could do `qplot(x, geom = "histogram", data = data.frame(x = x), main = i)`. – aosmith Apr 23 '18 at 22:48
That link explains exactly the problem. Thanks for pointing it out. – ywx Apr 24 '18 at 16:18

0 Answers0