Re: Ploting solution sets to compound inequalites

• To: mathgroup at smc.vnet.net
• Subject: [mg79764] Re: Ploting solution sets to compound inequalites
• From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
• Date: Fri, 3 Aug 2007 06:39:06 -0400 (EDT)
• Organization: The Open University, Milton Keynes, UK
• References: <f8s21o\$52\$1@smc.vnet.net>

```Diana wrote:
> Math folks,
>
> How would I plot just an x-axis number line with the solution sets of:
>
> -2<x<3
>
> -2<=x<=3
>
> x<=-2 or x>=3
>
> x<-2 or x>3
>
> for example?
>
> Diana M.
>
>

With version below 5.2 and below, you could use *InequalityPlot*. With
version 6.0 and above, you could use *RegionPlot*.

<< "Graphics`InequalityGraphics`"
ineq = -2 < x < 3;
InequalityPlot[ineq, {x, -4, 4}, {y, -10, 10},
PlotRange -> {{-10, 10}, All}, ImageSize -> 400,
Axes -> {Automatic, None}]
ineq = x <= -2 || x >= 3;
InequalityPlot[ineq, {x, -10, 10}, {y, -10, 10},
PlotRange -> {{-10, 10}, All}, ImageSize -> 400,
Axes -> {Automatic, None}]

(* 6.0 and above *)
ineq = -2 < x < 3;
RegionPlot[ineq, {x, -4, 4}, {y, -10, 10},
PlotRange -> {{-10, 10}, All}, Axes -> {Automatic, None},
Frame -> None]

Regards,
Jean-Marc

```

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