Re: Division by zero, despite strong hint

*To*: mathgroup at smc.vnet.net*Subject*: [mg96593] Re: Division by zero, despite strong hint*From*: dh <dh at metrohm.com>*Date*: Mon, 16 Feb 2009 16:42:04 -0500 (EST)*References*: <gnbk7i$3a3$1@smc.vnet.net>

Hi David, you have a syntax error. There is a comma missing in the definition of the piecewise function. Daniel dch888 wrote: > Hi, > > I'm trying to plot the Sin[1/x] curve with the curve being defined as > 0 at 0 like this: > > g3[x_] := Piecewise[{{Sin[1/x], x != 0} {0, x == 0}}] > > Invoking Plot produced a flat graph; puzzled I asked for g3[0] and > got: > > Power::infy Infinite expression 1/0 encountered >> > > { > {Indeterminate, False True}, > {0, \!\(\* > TagBox["True", > "PiecewiseDefault", > AutoDelete->False, > DeletionWarning->True]\)} > } > > Hmmm... what's the trick here to stop Mathematica evaluating all the branches > of the piecewise fn? There's nothing in the documentation that I can > see to stop this in Piecewise... perhaps I need to use a different Mathematica > function? > > Thanks, > David. >