Plot 2D vector field

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Hi
I have a table T of four columns x,y,u,v,
where x and y are the coordinates
and u and v are the values of the x and y components, respectively.
Thus, T represents a two-dimensional vector field.
For example, let
T=
1 3 -1 -1
1 4 0.500000000000000 -0.500000000000000
2 3 -0.250000000000000 0.250000000000000
2 4 0.100000000000000 0.100000000000000
I want to plot a 2-D vector field from this table!!!
I tried using the function:
coneplot(T)
but became the following error message:
??? Error using ==> coneplot>parseargs at 365
Wrong number of input arguments.
Error in ==> coneplot at 64
[x y z u v w cx cy cz s color quiv method nointerp] =
parseargs(nargs,args);
It seems that coneplot works only for 3-D.
Can someone tell me how to change this command line?
Thank you
Emerson

Accepted Answer

Walter Roberson
Walter Roberson on 31 May 2011
Sounds like you are looking for quiver
  3 Comments
Emerson De Souza
Emerson De Souza on 2 Jun 2011
Thank you Walter
Wish you a nice night
Emerson

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More Answers (1)

Qiujie Meng
Qiujie Meng on 2 Apr 2019
This is my code:
%%%%%%%%%%%%%%%%%%
close all;clc;clear all;
velocity=load('velocity100POINTS.txt');
x=velocity(:,1);
y=velocity(:,2);
u=velocity(:,3);
v=velocity(:,4);
figure
quiver(x,y,u,v)
%%%%%%%%%%%%%%%%%%%%%
Although my file has vectors,why the figure is like that......?
QQ截图20190402211109.png
QQ截图20190402211333.png

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