CODEWITHSUNDEEP
matlabfunctionplotequation
den
den

Reputation: 49

How to plot this?

So I'm given this equation x + e^(x^2) + e^(y^2) = r and I would like to plot it for r = [1.5, 4]. My work:

[X,Y] = meshgrid(-1.5:0.1:1.5,-1.5:0.1:1.5);
Z = X + exp(X^2) + exp(Y^2);
hold on;
[C,h]=contour(X,Y,Z,1.5:0.1:4);
clabel(C,h)
hold off;

but I only get straight lines, no circles. Please help.

Upvotes: 2

Views: 48

Answers (1)

dfrib
dfrib

Reputation: 73176

You missed the . in .^ for element-wise power operation. Replace the second row with the following, and the contour plot will yield the sought-after level curves

Z = X + exp(X.^2) + exp(Y.^2);

Upvotes: 4

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