Re: UnitStep[] Problem.
- To: mathgroup at smc.vnet.net
- Subject: [mg27338] Re: UnitStep[] Problem.
- From: "Paul Lutus" <nospam at nosite.com>
- Date: Wed, 21 Feb 2001 03:17:18 -0500 (EST)
- References: <96t8i6$ppr@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
"Dustin Darcy" <ddarcy at digipen.edu> wrote in message news:96t8i6$ppr at smc.vnet.net... > When I type in: > Table[UnitStep[x], {x, -3, 3}] > > it should yield: > {0,0,0,1,1,1,1} > > Instead, though, I get: > {UnitStep[-3],UnitStep[-2],UnitStep[-1],UnitStep[0],UnitStep[1],UnitStep > [2],UnitStep[3]} > > Is this due to not loading a certain package? The result you expect is obtained on newer versions of Mathematica. Have you tried: MyStep[x_] := If[x >= 0,1,0] Table[MyStep[x], {x, -3, 3}] {0,0,0,1,1,1,1} In this example, "MytStep[x]" is not exactly the same as Mathematica's own "UnitStep[x]." But it may meet your requirements. Also -- if you see a reference to "UnitStep[x]" in your version's help screens, then you need to re-install Mathematica. -- Paul Lutus www.arachnoid.com