Plot the plane x+z=0 in mathematica

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nameVoid
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How do I plot the plane x+z=0 in mathematica on the xyz plane
 
If you have Mathematica 9, just try
Code:
= plot x+z=0 plane
(don't forget to start with an equal sign).
 
This is not correct tag plus in plot x+z is protected
 
nameVoid said:
This is not correct tag plus in plot x+z is protected

What version of Mathematica do you have? Student version or Full version?
 
I'd suggest to use ParametricPlot3D (see attachement). The Student and full version of Mathematica are usually the same in function. I've the home edition of Mathematica 9 on my private laptop and it's absolutely identical with the full version on our institute's computers.
 
Attachments
  • Screenshot of Wolfram Mathematica home edition showing the input ParametricPlot3D[{x, y, -x}, {x, -5, 5}, {y, -5, 5}] and a 3D mesh plot of a plane with axes labelled from -5 to 5.
    parametric-plot-example.png
    24.9 KB · Views: 680
In Mathematica, any version, Plot3D wants an expression or function giving z values as a function of x and y coordinates so... turn x+z==0 into x==-z into -(x+0*y)==z (or just plot -x) and now you have a function giving z values to plot.

In[1]:= Plot3D[-(x + 0*y) (*==z*), {x, -3, 3}, {y, -4, 4}]
Out[1]= ...PlotSnipped...

Carefully check some points on the surface to verify this is correct.
And, if you don't already know... this ---> (*==z*) <--- is a comment in Mathematica code.