Why doesn't the quiver object property MaxHeadSize work?

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

[Hannah Nissan]

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?

Answer 1

[Dasharath Gulvady]

Which MATLAB release are you using? This might be helpful:

http://www.mathworks.com/matlabcentral/answers/96754-why-can-t-i-change-the-maxheadsize-property-of-a-quiver-handle-using-the-set-command-in-matlab-7-1

[Kevin J. Delaney]

I'm using R2015a.

[Dasharath Gulvady]

Can you share a sample code with which you can see the issue? Which operating system are you on?

Answer 2

[Abhiram Bhanuprakash]

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.

[Kevin J. Delaney]

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

Answer 3

[Julian Hapke]

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