Plot 2D vector field
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Emerson De Souza
il 31 Mag 2011
Modificato: Dyuman Joshi
il 6 Dic 2023
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
1 Commento
Qiujie Meng
il 2 Apr 2019
Spostato: Dyuman Joshi
il 6 Dic 2023
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......?
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Brijesh
il 6 Dic 2023
clc
clear all
syms x y
f = input('Enter:');
p = inline(vectorize(f(1)),x,y);
q = inline(vectorize(f(2)),x,y);
x = linspace(-1,1,10);
y = x;
[X, Y] = meshgrid(x,y);
U = p(X,Y)
V = q(X,Y)
quivert(X,Y,U,V,1)
axis on;
1 Commento
Dyuman Joshi
il 6 Dic 2023
Modificato: Dyuman Joshi
il 6 Dic 2023
@Brijesh, how exactly does your answer answers the question asked, that too 12 years ago and with an accepted answer.
There is no function as quivert and using inline and vectorize is not recommended.
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