Help in 3D plot for a piecewise function?

rubens951jti · May 24, 2021, 9:27pm

I want to plot a piecewise function but my 3dplot doesn’t work well, someone know where is the error on my code?

rohitnamjoshi · May 24, 2021, 10:31pm

Hi Rubens,

The predicate x < -10 && x > 10 (and similarly for y) is never True. Perhaps you meant to use ||?

V[x_, y_] := 
 Piecewise[{
  {5, x < -10 || x > 10 && y < -8 || y > 8}, 
  {0, x >= -10 || x <= 10 && y <= 8 || y >= -8}}]

Plot3D[V[x, y], {x, -15, 15}, {y, -15, 15}]

rubens951jti · May 24, 2021, 10:40pm

Yes, that’s it! thank you

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Help in 3D plot for a piecewise function?

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