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MathGroup Archive 2007

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Re: Plotting a straight line in a 3D plot

  • To: mathgroup at smc.vnet.net
  • Subject: [mg81030] Re: [mg80996] Plotting a straight line in a 3D plot
  • From: DrMajorBob <drmajorbob at bigfoot.com>
  • Date: Sat, 8 Sep 2007 03:55:13 -0400 (EDT)
  • References: <3083783.1189147430927.JavaMail.root@m35>
  • Reply-to: drmajorbob at bigfoot.com

Clear[x, y, z]
zFunctions = {1 - x, y - 1};
endpts = {x, y, z} /.
     First@Solve[
       Equal @@ Flatten@{z, zFunctions}, {y, z}] /. {{x -> -5}, {x ->
       5}};
Show[Plot3D[zFunctions, {x, -5, 5}, {y, -5, 5}],
  Graphics3D[{Thickness[.01], Line@endpts}]]

or (the line all by itself):

Graphics3D[{Thickness[.01], Line@endpts}]

Bobby

On Fri, 07 Sep 2007 01:08:36 -0500, kheimon <kheimon at gmail.com> wrote:

> Is there any way, in Mathematica, I can plot a straight line in a 3D
> plot environment?
>
> For example: Plot3D[{{y = 1 - x, z = y - 1}}, {x, -5, 5}, {y, -5, 5}]
>
> plots two surfaces, not their intersection (which is a straight line).
>
> Thank you in advance.
>
>
>



-- 

DrMajorBob at bigfoot.com


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