Plotting Streamlines that start from the origin for each streamline

Question

Omar Azami 2019-12-24

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/497953-plotting-streamlines-that-start-from-the-origin-for-each-streamline

回答： Pravin Jagtap 2019-12-27

Hello

I want to plot streamlines for the electric field of a dipole that starts from the origin for each streamline. My code is as follows

vr1 = vr(1,:)
vr2 = vr(2,:)
vr3 = vr(3,:)
vr11 = reshape(vr1,[6,6,6])
vr21 = reshape(vr2,[6,6,6])
vr31 = reshape(vr3,[6,6,6])
subplot(1,2,1)
for i = 1:size(pointst,2)
    quiver3(pointst(1,i),pointst(2,i),pointst(3,i),vr(1,i),vr(2,i),vr(3,i),'color','b')
    hold on
    xlabel('X-axis')
    ylabel('Y-axis')
    zlabel('Z-axis')
    plot3(0,0,0,'o','MarkerFaceColor','r')
    
    
end
hhh = streamline(X,Y,Z,vr11,vr21,vr31,0,0,0)
    set(hhh,'color','red')

The result I get is a single (very short) line segment from the origin instead of a bunch of field lines. I rotated the figure to show the xy-plane. It is a 3d vector field.