Hello
Changing the thickness is not too difficult, but changing the length may be rather complicated. Let me illustrate. You can generate your plot, say I do this
h = spiralArchimedean;
EHfields(h,4e9)
Then, you can grab the handles of your plot
h1=gca;
h1 is the handles of the fields and should have among many other fields, one called children, which will have 2 quivers, grab that again
h2=h1.Children;
>> h2
h2 =
2×1 Quiver array:
Quiver (H)
Quiver (E)
>> h2(1)
ans =
Quiver (H) with properties:
Color: [0.8500 0.3250 0.0980]
LineStyle: '-'
LineWidth: 0.5000
XData: [0 -0.0163 -0.0321 -0.0472 -0.0611 -0.0736 -0.0842 … ]
YData: [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -0.0050 … ]
ZData: [-0.1040 -0.1027 -0.0989 -0.0927 -0.0842 -0.0736 … ]
UData: [0.0126 0.0122 0.0113 0.0098 0.0080 0.0062 0.0044 … ]
VData: [0.0123 0.0121 0.0114 0.0103 0.0089 0.0073 0.0057 … ]
WData: [2.6980e-09 -0.0020 -0.0037 -0.0051 -0.0060 -0.0065 … ]
Show all properties
So you can directly modify the linewidth or the marker size
>> h2(1).LineWidth=2;
But to change the length, you would have to change the actual coordinates from where it starts and where it finishes. That will not be that easy. Hope this helps!
