Testing if an expression produces graphics.

Dave (from the UK) · science forum addict Joined: 12 Jan 2006 Posts: 76

I've written a front end to mathematica, but it needs the user to decide
in advance if the output will be text or graphics. If its graphics, it
will then Export[] it as a jpeg.

So for example

1+1 is not saved as a jpeg, but

Plot[Sin[c],{x,0,12}]
is actually converted to

Export["foo.jpg", Plot[Sin[c],{x,0,12}] ]

At the minute, as I write my application has two buttons "Text" and
"Graphical"

Non-working example at:
http://www.althorne.org/test/witm.php
(PS, don't try reaching that page with a PDA, as there is some *broken*
code that detects mobile devices.)

so the user must decide - hardly elegant it must be said.

Ideally I'd like something like that automatically if the output is
graphical or not, and if so puts the commands inside an Export[].

Any ideas?

--
Dave K MCSE.

MCSE = Minefield Consultant and Solitaire Expert.

Please note my email address changes periodically to avoid spam.
It is always of the form: month-year@domain. Hitting reply will work
for a couple of months only. Later set it manually.

http://witm.sourceforge.net/ (Web based Mathematica frontend)

Dave (from the UK · science forum beginner Joined: 01 Jun 2006 Posts: 1

Dave (from the UK) wrote:

Google