Re: Problems defining function
- To: mathgroup at smc.vnet.net
- Subject: [mg40393] Re: Problems defining function
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Fri, 4 Apr 2003 01:21:00 -0500 (EST)
- Organization: Universitaet Leipzig
- References: <b6gm4c$cff$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
> Hello,
> I am defining a function:
> h[x_]:=0/;x<0
> h[x_]:=x/;x>=0
>
> When I try to plot the function:
> Plot[h[x],{x,-1,1}]
>
> I see that it's defined as h[x_]:=x on all values, not only positive ones.
> What am I missing here?
your eyeglasses ?
Clear[h] or start a fresh Mathematica kernel or try
h[x_] := UnitStep[x]*x
Anyway you definition above is correct and you can check it
with
DownValues[h]
Regards
Jens