3D/2D vector field plotter

This function can plot both 3D and 2D vector field based on the input symbolic expression ...

Description

vectline is "vector field line plotter". Depending on the dimension of coordinate axis, vectline can plot both 3D and 2D vector field line.

Example for 2D field
>> syms x y
>> F = [-y, x];
>> vectline(F,[x,y],[-1,1,-1,1])

Example for 3D field

>> syms x y z
>> F = [x*y^2, x*y, z];
>> vectline(F,[x,y,z],[-1,1,-2,3,1,3])

• Required Products: Symbolic Math Toolbox
• MATLAB release: MATLAB 6.5 (R13)

[Peter Bodin]

Really nice function. It would be even nicer if it returned the quivergroup handles, but I could easily fix that myself.

[Vince SaBella]

 

[Mike Weems]

Awesome......just what i needed. Thanks

[Krastimir Popov]

 

[PAJ PANB]

 

[camilo calvo]

 

[Quentin Brandon]

Works perfectly.
Compact and clean code easily tweakable.

[Will Ludington]

using MATLAB R2006b intel-based mac version, the original source code does not plot. adding a line to the code to produce a new figure before the quiver command fixes the problem.
......

        u=junk(:,1:k/3,:);
        v=junk(:,k/3+1:2*k/3,:);
        w=junk(:,2*k/3+1:k,:);

figure; %<<ADD THIS LINE>>
        
        quiver3(px,py,pz,u,v,w)

[cricket4me Usulub]

how the heck do i open this??

[Daniel Sutton]

A very good piece of code, this should be a standard feature of MATLAB

[Paul T]

Very useful function. It would be nice if it is possible to specify the density (on the plot) of the vectors. Good job.

[Arun Sahu]

The Function is really useful, but would have been better if we could control the precision... to get a more accurate plot.

[Aamir]

I need exactly such a plotting tool but for numeric arrays not symbolic maths. Any suggestions please?

[Jose Ortiz]

Very nice!!!!

[Alexandr]

Hello. Interesting code. I need this kind of graphs for my work but I cannot understand what it actually plots. Could you please tell me more about those arrows. What do they show and which values of a function are involved in the plotting? Thank you. Alex.

[Max]

Exactly what I needed. Is there a way to make the values of the axes in increments of 1 instead of 2?

[David Reilly]

Simple and Elegant.

[Hasitha Senanayake]

 

[Linford]

Great so far, but I have one question: I am trying to do this for the vector field F=[0.5*x,0*y] and it's giving me an error message. Any ideas why?