Quiver Plot Arrows too Wide

Hello everyone, sorry I'm asking what seems like a rudimentary question but I've probably spent the better half of an hour online trying to solve my problem and I have not gotten anything to work. I'm making a quiver plot with specific vectors at specific locations using the plot function:

quiver(x,y,u,v)

unfortunately, my plot is what is shown below...

Those are arrows believe it or not. I can't seem to find a simple solution to making the arrow heads not so wide! My data in the x direction only varies from .6 to .7 but the x axis has been severely widened due to these wide arrows. Thank you for any help!

[Walter Roberson]

I have been fighting this as well, especially for quiver3. Not everything is affected, but I have not figured out when it happens.

[crisdeodates]

Are there any leads on this issue? I used to get the arrows in Quiver3 correctly for a while, and alas!! all of a sudden one day, all the heads became so wide!! I still wonder what happened as I didnt change anything with the code. Might be an issue after MATLAB update? In anycase, waiting for a promising solution by the fellow community members....

[Pablo Israel Morales Guzmán]

I think it has something to do with the values in both axes. They need to be have similar values in order for the arrows to display properly.

[Joaquin Guillamon]

Hi Pablo, I'm writing regading a similar issue with the width of the arrows in the quiver plot you've got some years ago. Could you realized what was the problem?? I've tried a lot of different things but cannot make it look nice those arrows... If you know how to solve it, I appreciate any suggestion or help you can give me! Thanks!

Answer 1

[Andrew Newell]

Have you tried looking at the documentation for quiver? There is an option

quiver(...,scale)

In your example, you could try

scale=0.1;
quiver(x,y,u,v,scale)

and tweak scale to get what you want.

[Andrew Chen]

Thanks for your response. I have tried this and unfortunately this does not decrease the width but only "squishes" the arrow head from tip to tail. The arrow remains just as wide.

[Andrew Newell]

Sorry! Try this:

h = quiver(x,y,u,v);
hs = get(h,'MaxHeadSize');
set(h,'MaxHeadSize',hs/10)

[Andrew Chen]

I've never come across this notation before. It doesn't seem to work. How would this code factor into actually plotting the quiver plot? I will do some searching to see if I can find an answer and will let you know if I find one if I do before you respond.

[Andrew Newell]

Working with Graphics Objects may help familiarize you with my use of h and the get/set interface. It certainly works in tests I have done.

Answer 2

[Timothy Russell]

Another question I have about the quiver3 plot...I'm trying to graph a vector in 3D and want to save a picture of it at a certain angle but the arrow head doesn't show up well at that angle. Can I somehow rotate the vector so the arrowhead shows up? thanks, tim

[KAE]

Make this a separate question and you are more likely to get an answer.