Re: simple pattern match question
- To: mathgroup at smc.vnet.net
- Subject: [mg91159] Re: simple pattern match question
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Fri, 8 Aug 2008 07:12:26 -0400 (EDT)
- References: <g7ed78$2po$1@smc.vnet.net>
Hi, because you mean f[x_?NumericQ]:=x^2 Regards Jens congruentialuminaire at yahoo.com wrote: > Hello UG: > > I am trying to understand simple pattern rule evaulation. The > following trivial examples baffles me: > > --------------------------------------------------- > In[1]:= f[x_Number] := x ^ 2 > In[2]:= f[3] > Out[2]= f[3] > > In[3]:= f[3.3] > Out[3]= f[3.3] > > In[4]:= NumberQ[3.3] > Out[4]= True > -------------------------------------------------- > Why is it that f[3.3] does not evaluate?? > > TIA. > > Regards..RogerW >