How to use ezplot ?

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RuiQi
RuiQi 2018-2-28
回答： Star Strider 2018-2-28
I typed this but nothing shows up
syms x1 x2
f(x1, x2) = x1^2 + 9*x2^2;
ezplot(f);

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采纳的回答

Star Strider
Star Strider 2018-2-28
For a function of two variables, use the ezsurf (or preferably fsurf) function instead:
syms x1 x2
f(x1, x2) = x1^2 + 9*x2^2;
ezsurf(f)
or:
syms x1 x2
f(x1, x2) = x1^2 + 9*x2^2;
fsurf(f)

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