Re: [R] print to .jpeg

[Luke Miller]

How about using paste() inside the jpeg() function to append a '.jpg' to the
end of your species name?
See the change below. I also added a dev.off() to close the newly created
jpeg.

species.name="CussoniaHolstii"
dia<-10:100
biomass = -21.4863 + 0.5797 * (dia ^ 2)
biomass
jpeg(paste(species.name, '.jpg', sep = '')
plot (biomass, main=species.name, xlab="dbh in cm", ylab="biomass in kg")
dev.off()

On Tue, Apr 12, 2011 at 9:54 PM, Benjamin Caldwell
<btcaldw...@berkeley.edu>wrote:

> Evening folks,
>
> I'm trying to print a series of graphs to .jpeg using a variable as the
> title, but run into the difficultly that I can't find a way to append the
> file extension to the .jpeg (in this case extensionless!) files.
>
> Example:
> ----
> species.name="CussoniaHolstii"
> dia<-10:100
> biomass = -21.4863 + 0.5797 * (dia ^ 2)
> biomass
> jpeg(species.name)
> plot (biomass, main=species.name, xlab="dbh in cm", ylab="biomass in kg")
> -----
> The output is CussoniaHolstii, but I want CussoniaHolstii.jpg. The help
> file
> for jpeg() specifies that the name include the extension (e.g.
> jpeg("CussoniaHolstii.jpg") but then I'd have to input the file name each
> time.
>
> Any help or workaround much appreciated.
> *
> *
> *Ben Caldwell*
>
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>
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-- 
___________________________
Luke Miller
Postdoctoral Researcher
Marine Science Center
Northeastern University
Nahant, MA
(781) 581-7370 x318

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