How do I plot a 3d surface over a specified domain?

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Emily
Emily am 20 Apr. 2014
Beantwortet: Walter Roberson am 20 Apr. 2014
I apologise if this has been answered before but I cannot find the answer!
I want to plot the surface: 3a(b-a)^2 / 24b over the 'wedge' in the positive orthant with a \leq b.

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Walter Roberson
Walter Roberson am 20 Apr. 2014
Create a rectangular grid that is the bounding box. For points inside the wedge, set the grid value to the expression you gave. For points outside the wedge, set the grid value to NaN. At the end, surf() the result.

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