Piecewise Functions
- To: mathgroup at smc.vnet.net
- Subject: [mg4555] Piecewise Functions
- From: dwarf at wam.umd.edu (Dwarf)
- Date: Wed, 7 Aug 1996 04:18:03 -0400
- Organization: University of Maryland, College Park, MD
- Sender: owner-wri-mathgroup at wolfram.com
I am trying to use Mma to solve a model where the system behaves a certain way up to a point, and an entirely different way after that point. The result is something like: f[x_/;x<4]:=0 f[x_/;x>=4]:=InterpolatingFunction<<...>> This part I can get to work no problem. For part of my analysis, I would like to take the derivative of the function, but all I get is an identity In[5] f'[x] Out[5] f'[x] Can anyone help? +----------------------------+ | | I understand mine's a risky plan, | Greg Anderson | and your system can't miss | dwarf at wam.umd.edu | but is security, after all a cause | timbwolf at eng.umd.edu | or symptom of happiness. | | +----------------------------+ Dream Theater -- A Matter of Time ==== [MESSAGE SEPARATOR] ====