Why doesn't the quiver object property MaxHeadSize work?

2015 5 11
3 个回答
更新时间：2016 7 4
11 次查看（30 天）

0 个投票

Changing the quiver object property MaxHeadSize has no effect on the displayed quiver object.

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Hannah Nissan
Hannah Nissan 2016-7-4
编辑：Walter Roberson 2016-7-4
I still find this problem, using 2016a. I am able to change the arrow head size using the test code:
q = quiver(1:10,1:10);
%Observe the figure after doing each of these
q.MaxHeadSize = 0.1;
q.MaxHeadSize = 0.01;
q.MaxHeadSize = 0.5;
but can't get it any larger than 0.5. For my data, this makes it impossible to see which direction the arrow is pointing...
Any suggestions?

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回答（3 个）

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Hi Kevin,
I tried the following in MATLAB R2015a and it worked:
q = quiver(1:10,1:10);
%Observe the figure after doing each of these
q.MaxHeadSize = 0.1;
q.MaxHeadSize = 0.01;
q.MaxHeadSize = 0.5;
If you find that this example works and you are facing issues with the particular figure which you have, can you please share your code (and data) so that I can reproduce the issue at my end?
Hope this helps,
Abhiram.

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Kevin J. Delaney
Kevin J. Delaney 2015-5-13
Abhiram: Thanks for your answer. Yes, I see the arrowhead sizes changing in your example, but nothing changes once MaxHeadSize reaches 0.5.
I can shrink the head sizes, but can't expand them past 0.5--and that would be useful to make them more prominent in my application (please see the attached figure file). Prior to R2014b, I was able to get to the arrowheads and manipulate them directly.
Thanks, Kevin

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Julian Hapke
Julian Hapke 2016-4-7

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Here's my findings... Testcode:
function tst
close all
figure(3)
clf;
hold on
for ii = 1:15
quiver(ii/2, 0, 0, 1, 0, 'MaxHeadSize', ii/10);
end
for ii = 1:15
quiver(ii/2+0.125, 0, 0, 2, 0, 'MaxHeadSize', ii/10);
end
for ii = 1:15
quiver(ii/2+0.25, 0, 0, 3, 0, 'MaxHeadSize', ii/10);
end
figure(4)
clf;
hold on
for ii = 1:15
p = quiver(ii/2, 0, 0, 1, 0);
set(p,'MaxHeadSize', ii/10);
end
for ii = 1:15
p = quiver(ii/2+0.25, 0, 0, 2, 0);
set(p,'MaxHeadSize', ii/10);
end
figure(5)
[x,y] = meshgrid(0:0.2:2,0:0.2:2);
u = cos(x).*y;
v = sin(x).*y;
subplot(1,3,1)
quiver(x,y,u,v);
subplot(1,3,2)
quiver(x,y,u,v,'MaxHeadSize', 0.8);
subplot(1,3,3)
quiver(x,y,u,v,'MaxHeadSize', 5);
end
Prior to 2015a, the MaxHeadSize = 1 leads to wrong results if the length of the arrow is not 1, this is fixed with 2015a.
MaxHeadSize > 1.1 does not seem to have any effect (with the chosen data)
The MaxHeadSize Property does not have any effect on the example code taken from here
http://de.mathworks.com/help/matlab/ref/quiver.html

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