Re: plot help

• To: mathgroup at smc.vnet.net
• Subject: [mg39587] Re: [mg39572] plot help
• From: BobHanlon at aol.com
• Date: Tue, 25 Feb 2003 02:55:16 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

```In a message dated 2/24/03 4:10:12 AM, chiu at fkf.mpg.de writes:

> I am a new mathetica user and learning to plot my band diagram,
> i.e., energy E vs wave vector k. Assumed that E(k, y) and y is a
> series of integers.
>
> I use the following function:
>
> Plot[k^2+y, {k, -Pi, Pi}, {y, -3, 3}]
>
> and would like to plot "a series of" bands in a 2D plot, however, it
> did not work.
>

Plot3D[k^2+y, {k, -Pi, Pi}, {y, -3, 3}];

Needs["Graphics`Graphics`"];

DisplayTogetherArray[Plot[Evaluate[

Table[k^2+y, {k,0,Pi, Pi/6}]],

{y,-3,3}, PlotStyle -> Table[Hue[k], {k,0,1,1/6}],

Frame->True, Axes->False, FrameLabel->{"y", "E"},

Epilog->{Text["k=0", {0,0},{-1,1}],

Text["k=\[PlusMinus]Pi", {0,Pi^2},{1,-1}]}],

Plot[Evaluate[

Table[k^2+y, {y,-3,3}]],

{k,-Pi,Pi}, PlotStyle -> Table[Hue[k], {k,0,1,1/6}],

Frame->True, Axes->False, FrameLabel->{"k", "E"},

FrameTicks->{PiScale, Automatic, None, Automatic},

Epilog->{Text["y=-3", {0,-3},{0,1}],

Text["y=3", {0,3},{0,-1}]},

PlotRange->{Automatic,{-4.5,13.5}}],

ImageSize-> 600];

Bob Hanlon

```

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