Want to use Module
- To: mathgroup at smc.vnet.net
- Subject: [mg9773] Want to use Module
- From: Ersek_Ted%PAX1A at mr.nawcad.navy.mil
- Date: Tue, 25 Nov 1997 00:07:24 -0500
- Sender: owner-wri-mathgroup at wolfram.com
I need to write a function like foo[x] below. In[1]:= y[x_]:=x Exp[x]+2; In[2]:= foo[x_]/;(temp=y[x]; temp<100):= 2/(3+temp) In[3]:= foo[2] Out[3]= 2/(5 + 2*E^2) In[4]:= foo[20] Out[4]= foo[20] In[5]:= Clear[s]; foo[s] Out[5]= foo[s] Notice foo[x] is only defined when (y[x]<100). (y[20]<100)->False, so foo[20] is returned unevaluated. (y[s]<100) is not defined, so foo[s] is returned unevaluated. I used (temp=y[x]) so I wouldn't have to evaluate y[x] twice. How can I do this with (temp) inside a Module, so it is local to (foo[x])? Thanks Ted Ersek ersek_ted%pax1a at mr.nawcad.navy.mil