You don't need to declare the variables...

it is just:

[expr if ($f3 > 0, $f1 + $f2, 0); if ($f3 < 0, $f1 - $f2, 0)]

but you will have 2 outlets (one for each "if"), and not an "else" for the same outlet.... in fact, it would be nice to have an "else" on Yadegari's externals... For more information see: http://www.crca.ucsd.edu/~yadegari/expr.html

josé

Derek Holzer escreveu:

I would like to use [expr] for an "if, then, else" statement:

If $f3 > 0, then $f1 + $f2, else $f1 - $f2

In the help for [expr], I see the following:

[expr $f1; if ($f1 > 0, $f1 * 2, 0); if ($f1 <= 0, $f1 / 2, 0)]

So I try:

[expr $f1, $f2, $f3; if ($f3 > 0, $f1 + $f2, 0); if ($f3 < 0, $f1 - $f2, 0)]

but it doesn't create. I also tried without the final ",0" in each statement, and also this way:

[expr $f1, $f2, $f3; if ($f3 > 0, $f1 + $f2, $f1 - $f2)]

Can someone explain to me the proper syntax for this?

D.

ps... gotta love the fact I can copy/paste text in and out of objects etc these days!