how can I remove the special region in 3d graphe and how can I extract the 2d graph (YZ plane) from this 3d graph

</matlabcentral/answers/uploaded_files/38612/triangle.JPG> hello. my first question is how can I remove the special region in 3d graphe. as shown in picture, I want to remain plot of the triangle region. in this case, what I can do is just remove the value of each position,not triangle region, one by one?

second one is I want to extract the 2d graph from the 3d graph. for example. x is fix to 100, and I want to see the value of z depending on the value of y. thank you.

[Star Strider]

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