How to plot gradients ?

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qweasd
qweasd 2020-10-1
编辑： Niklas Kurz 2022-3-13

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Star Strider
Star Strider 2020-10-1
  14 个评论
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Star Strider
Star Strider 2021-9-29
Ran in:
Yes, it is!
x = linspace(3, 4, 25);
y = linspace(5, 6, 25);
[X,Y] = meshgrid(x,y);
z = @(x,y) x.^2+y.^5+3*x+4*y;
Z = z(X,Y);
[px,py] = gradient(Z);
figure
contour(X,Y,Z)
hold on
quiver(X,Y,px,py)
hold off
.
Niklas Kurz
Niklas Kurz 2022-3-13
编辑：Niklas Kurz 2022-3-13
I would opt to normalise the Arrows for better scaling:
Norm = sqrt(px.^2+py.^2)
quiver(X,Y,px./Norm,py./Norm,0.5)
Otherwise the code is pretty neat!

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