Re: piecewise vs which

*To*: mathgroup at smc.vnet.net*Subject*: [mg60115] Re: piecewise vs which*From*: "dkr" <dkrjeg at adelphia.net>*Date*: Sat, 3 Sep 2005 02:06:02 -0400 (EDT)*References*: <df9437$620$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

This is not a bug. By default Piecewise gives a value of 0 if none of the conditions apply. But you can add an extra argument to change that default. In[1]:= f[x_]:=Piecewise[{{x^2,x<2},{3x,x>2}},Null]; In[2]:= f[2] In[3]:= g[x_]=Which[x<2,x^2,x>2,3x]; In[4]:= g[2]