I can't draw the vector field

2 次查看（过去 30 天）
윤형
윤형 2023-6-4
回答： the cyclist 2023-6-4
[x, y] = meshgrid(-0.9:0.3:0.9, -0.9:0.3:0.9);
R1 = (x.^2 + y.^2).^.5;
V = 1./R1;
figure(1)
surf(x, y, V)
view(-37.5, 20)
figure(2)
contour(x, y, V, 5)
hold on
axis square
[u, v] = gradient(V, 0.2);
quiver(x, y, -u, -v, 1.5)
axis equal
I can't draw the vector field. What's the problem

请先登录，再回答此问题。

回答（2 个）

Simon Chan
Simon Chan 2023-6-4
The spacing used in function gradient is 0.2, but the spacing in your data is 0.3 and hence it give you an error. Try using same spacing.
the cyclist
the cyclist 2023-6-4
Ran in:
The problem is the Inf values in u and v. Removing them:
[x, y] = meshgrid(-0.9:0.3:0.9, -0.9:0.3:0.9);
R1 = (x.^2 + y.^2).^.5;
V = 1./R1;
figure(1)
surf(x, y, V)
view(-37.5, 20)
figure
contour(x, y, V, 5)
hold on
axis square
[u, v] = gradient(V, 0.2);
u(isinf(u)) = NaN;
v(isinf(v)) = NaN;
quiver(x, y, -u, -v,1.5)
axis equal

类别

在 Help Center 和 File Exchange 中查找有关 Triangulation Representation 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by