Dear Adam,

ggsave() works only with single ggplot object. You need the standard R way of 
saving those plots.
1) open a suitable device
2) plot the figures
3) close the device

tiff(filename = "Figure 1.tiff", scale = 1, width = 10, height = 5, units = 
"cm", dpi = 300)
grid.arrange(plot1, plot2, ncol=2)
dev.off()

Best regards,

ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and 
Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium
+ 32 2 525 02 51
+ 32 54 43 61 85
thierry.onkel...@inbo.be
www.inbo.be

To call in the statistician after the experiment is done may be no more than 
asking him to perform a post-mortem examination: he may be able to say what the 
experiment died of.
~ Sir Ronald Aylmer Fisher

The plural of anecdote is not data.
~ Roger Brinner

The combination of some data and an aching desire for an answer does not ensure 
that a reasonable answer can be extracted from a given body of data.
~ John Tukey


-----Oorspronkelijk bericht-----
Van: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] Namens 
Adam Hayward
Verzonden: woensdag 18 juni 2014 21:18
Aan: r-help@r-project.org
Onderwerp: [R] Publication-ready figures with two plots

Hi all,

I have quite a specific problem with producing 300ppi plots in tiff format for 
publication. I have found ggsave to work beautifully with a single plot, which 
can then be exported to GIMP to compress the resulting large tiff file. 
However, it seems to run into trouble when plotting two figures next to each 
other, e.g.

plot1<-ggplot(.........)
plot2<-ggplot(.........)
grid.arrange(plot1, plot2, ncol=2)

ggsave(filename = "Figure 1.tiff", scale = 1, width = 10, height = 5, units = 
"cm", dpi = 300)

This results in only plot2 appearing in the resulting tiff file, with plot
1 nowhere to be seen.

I will also have a figure which does not use ggplot, but consists of three 
plots produced with barplot2 and matplot, but presumably this faces a similar 
problem. Essentially, could anyone suggest a way of translating what appears in 
the plot appearing in the plot window (I use RStudio) to a high-resolution tiff 
file with as little fuss as possible?

Many thanks,

Adam



--
Adam Hayward
Post-Doctoral Research Associate, University of Sheffield 
http://adhayward.wordpress.com/
https://twitter.com/adhayward18

Department of Animal and Plant Sciences
Alfred Denny Building
University of Sheffield
Western Bank
Sheffield S10 2TN
UK
http://www.huli.group.shef.ac.uk/adam-personal.html

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