[R] print to .jpeg

[Benjamin Caldwell]

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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