Quiver Plot Arrows too Wide

Question

Andrew Chen 2017-4-23

3
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评论： Joaquin Guillamon 2021-8-21

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!

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Pablo Israel Morales Guzmán 2021-5-4

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 2021-8-21

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!

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Answer 1

Andrew Newell 2017-4-23

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在 MATLAB Online 中打开

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.

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Andrew Chen 2017-4-24

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 2017-4-24

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.

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Answer 2

Timothy Russell 2017-5-26

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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