[R] Problem with gridExtra

[Lorenzo Isella]

Dear All,
Please consider the snippet at the end of the email, largely based on
what you find here

http://bit.ly/1ND6MGa

When I run it, I get this error

Error in arrangeGrob(p, sub = textGrob("Footnote", x = 0, hjust =
-0.1,  :
  could not find function "textGrob"

However, the code runs on another machine I own. I suppose something
must have changed in the gridExtra library but right now I am banging
my head against the wall.

This is my sessionInfo()

> sessionInfo()
R version 3.2.2 (2015-08-14)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Debian GNU/Linux stretch/sid

locale:
 [1] LC_CTYPE=en_GB.utf8       LC_NUMERIC=C
  [3] LC_TIME=en_GB.utf8        LC_COLLATE=en_GB.utf8
   [5] LC_MONETARY=en_GB.utf8    LC_MESSAGES=en_GB.utf8
    [7] LC_PAPER=en_GB.utf8       LC_NAME=C
     [9] LC_ADDRESS=C              LC_TELEPHONE=C
     [11] LC_MEASUREMENT=en_GB.utf8 LC_IDENTIFICATION=C

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] gridExtra_2.0.0 ggplot2_1.0.1

loaded via a namespace (and not attached):
 [1] Rcpp_0.11.6      digest_0.6.8     MASS_7.3-43      grid_3.2.2
  [5] plyr_1.8.3       gtable_0.1.2     magrittr_1.5     scales_0.3.0
   [9] stringi_0.5-5    reshape2_1.4.1   proto_0.3-10     labeling_0.3
   [13] tools_3.2.2      stringr_1.0.0    munsell_0.4.2
 colorspace_1.2-6

Any suggestion is appreciated.
Cheers

Lorenzo


##############################################################
library(ggplot2)
toyota <- mpg[which(mpg$manufacturer == 'toyota'), ]
p <- ggplot(toyota, aes(displ, hwy)) + facet_wrap(~ class, ncol = 2) +
geom_point(aes(size=cyl))
print(p)
library(gridExtra)
g <- arrangeGrob(p, sub = textGrob("Footnote", x = 0, hjust = -0.1,
vjust=0.1, gp = gpar(fontface = "italic", fontsize = 18)))
ggsave("/Users/Alan/Desktop/plot_grid_extra.png", g)