R help - May 2010 - Can not save plot to png file correctly

You can save as png like this too:

library(ggplot2)
data=data.frame(
? X=sample(10,1000,replace=T)
? , Y=letters[1:10])
png("mypng.png")
qplot(X, data=data, geom='histogram') + facet_wrap( ~ Y)
dev.off()
?
Felipe D. Carrillo
Supervisory Fishery Biologist
Department of the Interior
US Fish & Wildlife Service
California, USA



----- Original Message ----
> From: Peng Yu <pengyu.ut at gmail.com>
> To: ggplot2 <ggplot2 at googlegroups.com>
> Sent: Mon, May 31, 2010 12:20:12 PM
> Subject: Can not save plot to png file correctly
> 
> library(ggplot2)
data=data.frame(
? 
> X=sample(10,1000,replace=T)
? , Y=letters[1:10]
? 
> )
p=qplot(X, data=data, geom='histogram') + facet_wrap( ~ Y)
save(p, 
> file='error.png')
The above qplot work properly if I don't plot it to a
> file. But if I
plot it to a png file, the png file is always corrupted. Would
> you
please let me know what is wrong?

-- 
> 
Regards,
Peng

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With ggsave the graph windows pops up but using:
png("mypng.png")
qplot(X, data=data, geom='histogram') + facet_wrap( ~ Y)
dev.off()
The graph is saved in the background
Is there a way to hide the graph window when
using ggsave?

You can save as png like this too:

library(ggplot2)
data=data.frame(
? X=sample(10,1000,replace=T)
? , Y=letters[1:10])
png("mypng.png")
qplot(X, data=data, geom='histogram') + facet_wrap( ~ Y)
dev.off()

?
Felipe D. Carrillo
Supervisory Fishery Biologist
Department of the Interior
US Fish & Wildlife Service
California, USA