Re: Plot equations and inequalities together
- To: mathgroup at smc.vnet.net
- Subject: [mg65332] Re: Plot equations and inequalities together
- From: "dennis" <dwangsness at earthlink.net>
- Date: Mon, 27 Mar 2006 06:55:57 -0500 (EST)
- References: <e035gn$2cb$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Bonny wrote:
> I am not being able to plot graphs of equations and inequalities together,
> for e.g. (x==5 && y==10) || (x>5 && y==15). I tried InequalityPlot but that
> does not work; it plots only inequalities. Can anyone tell me a command (or
> a combination of commands or a graphics package) in Mathematica that I can
> use to plot graphs of equations and inequalities together similar to the
> example above?
>
> Thanks much.
The Boole function might be what you need.
DensityPlot[Boole[(x==5 && y==10) || (x>5 && y==15)],{x, 0, 20}, {y, 0,
20}]
seems to show your regions. You might play around with PlotPoints, but
some, probably most, values for PlotPoints will miss your point and
line region. To make your regions a little more easily hit on in a
plot you might replace quantities like x==5 with Abs[x-5]<some small
value.
Dennis