Plotting a saddle at given points?

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mdawg22
mdawg22 2020-3-8
回答： Star Strider 2020-3-8
I have a function f(x,y) = (Polynomials of x and y)
I solved this on paper and found that I have saddle points at (1,3)
I am wondering how I can plot this on matlab?
I attempted to use fplot and since my function has x and y (two variables ) it didnt work.
I also tried the basic meshplot of a saddle but I couldnt get my points to be incorperated in the graph.
Thanks

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回答（1 个）

Star Strider
Star Strider 2020-3-8
‘I attempted to use fplot and since my function has x and y (two variables ) it didnt work.’
Use fsurf instead.

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