Morph a graph into another graph?

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Jovos
Jovos 2016-3-19
回答： Star Strider 2016-3-19
Hi, I got a question asking me to smoothly morph the graph of y = x^2 + y^2 into a graph of y = -x^2 + y^2 and back again. I used the function morph but it does not work. I wonder is there any other functions/syntax to this? Any information is helpful. Thanks.

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回答（1 个）

Star Strider
Star Strider 2016-3-19
One approach:
[X,Y] = meshgrid(linspace(-5, 5, 50));
fcn = @(x,y,k) k*x.^2 + y.^2;
v = [1:-0.05:-1; -1:0.05:1];
for k1 = 1:2
for k2 = v(k1,:)
surf(X, Y, fcn(X,Y,k2))
axis([-5 5 -5 5 -40 60])
drawnow
pause(0.1)
end
end

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