Re: Drawing a Line From One Plot to Another

• To: mathgroup at smc.vnet.net
• Subject: [mg127721] Re: Drawing a Line From One Plot to Another
• From: Alexei Boulbitch <Alexei.Boulbitch at iee.lu>
• Date: Fri, 17 Aug 2012 03:41:43 -0400 (EDT)
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```Hello everyone,

Say I have two plots, y=x^2 and y=2x,
aligned vertically using GraphicsColumn.
Their domains are aligned because x runs
from -3 to +3 in both.  I'd like to be
able to draw a line from a point in the
top graph to a point in the bottom graph.  How can I do that?

Regards,

Gregory

Hi, Gregory,

Here is a minimalistic approach. Try it:

pl1 = Plot[x^2, {x, -3, 3}];
pl2 = Plot[2 x, {x, -3, 3}];

Show[{GraphicsColumn[{pl1, pl2}],
Graphics[{Red, Thick,
Line[{Scaled[{0.6, 0.12}], Scaled[{0.6, 0.64}]}]}]}]

Have fun, Alexei

Alexei BOULBITCH, Dr., habil.
IEE S.A.
ZAE Weiergewan,
11, rue Edmond Reuter,
L-5326 Contern, LUXEMBOURG

Office phone :  +352-2454-2566
Office fax:       +352-2454-3566
mobile phone:  +49 151 52 40 66 44

e-mail: alexei.boulbitch at iee.lu

```

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