Re: How to plot discontinuous functions?
- To: mathgroup at smc.vnet.net
- Subject: [mg90148] Re: How to plot discontinuous functions?
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Tue, 1 Jul 2008 06:56:11 -0400 (EDT)
- Organization: Uni Leipzig
- References: <g4a6tv$8uh$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
Hi,
f[x_] := If[x < 1, 1, 2];
Plot[f[x], {x, 0, 2}, PlotRange -> {0, 3}, Exclusions -> {x == 1}]
Regards
Jens
Aaron Fude wrote:
> Hi,
>
> If a function is defined via If, then when plotted it does not
> acknowledge the discontinuity. E.g.
>
> f[x_] := If[x < 1, 1, 2];
> Plot[f[x], {x, 0, 2}, PlotRange -> {0, 3}]
>
> Defined via Piecewise, it does, but in my experience, not always:
> f[x_] := Piecewise[{{{1, 1}, x < 1}}, {2, 2}];
> Plot[f[x][[1]], {x, 0, 2}, PlotRange -> {0, 3}]
>
> How do I make the Plot function try to acknowledge the discontuity by
> not connecting the left limit and the right limit?
>
> Thanks,
>
> Aaron
>