A variable defaulting to a previous variable?
- To: mathgroup at smc.vnet.net
- Subject: [mg121920] A variable defaulting to a previous variable?
- From: Brentt <brenttnewman at gmail.com>
- Date: Thu, 6 Oct 2011 04:25:54 -0400 (EDT)
- Delivered-to: firstname.lastname@example.org
How would one go about making a variable default to a previous variable? I would like results like this: In= f[x_, y_: x] := x+y; > In= f[2,3] > Out= 5 > In= f > Out= 6 > But, of course, Mathematica won't let me use a previous argument for the default of the next argument. Is there a way to do this?