Error using Quiver function
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Hi, I am having an error using Quiver. Below is my code.
[X,Y] = meshgrid(-1:0.1:1, -1:0.1:1);
k=2*pi;
syms U_inf Lambda Psi X Y u v
Psi = U_inf*Y+((Lambda/k)*atan(Y/X));
u = diff(Psi,Y);
v = diff (Psi, X);
quiver (X,Y,u,v)
The error is "Unable to convert expression into double array."
I believe I am not using the syms correctly. Any help is appreciated!
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Respuestas (1)
KSSV
el 19 de Sept. de 2020
You cannot use like that. You need to take all data in double i.e in numbers to plot the arrows.Something like below:
[X,Y] = meshgrid(-1:0.1:1, -1:0.1:1);
k=2*pi;
U_inf = rand ; % define your value
Lambda = 1. ; %define your value
Psi = U_inf*Y+((Lambda/k)*atan(Y./X));
u = gradient(Psi);
v = gradient(Psi);
quiver (X,Y,u,v)
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