Error in using contourf
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
I got error while running this code which is the error of countourf. How to fix this?
clear, all clc;
x = linspace(-1,1);% create linear spacing in x-direction
y = linspace(-1,1);% create linear spacing in y-direction
%initialise velocity
U = 1;%freestream velocity
%looping in i and j-directions
for i = 1:length(x)
for j = 1:length(y)
%create x & y space
xx(i,j) = x(i);
yy(i,j) = y(j);
%calculate radius from x & y
rad(i,j) = sqrt(x(i)^2 + y(j)^2);
% calculate angle from x and y
if x(i) > 0
theta(i,j) = atan(y(j)/x(i));
elseif x(i) <0 && y(j) >= 0
theta(i,j) =atan(y(j)/x(i))+pi;
elseif x(i) < 0 && y(j) < 0
theta(i,j) = atan(y(j)/x(i))-pi;
elseif x(i) == 0 && y(j) < 0
theta(i,j) = pi/2;
else
theta(i,j) = -pi/2;
end
% calculate stream function using polar coordinate system
psi(i,j) = U *rad(i,j)*sin(theta(i,j));
% calculate velocity potential using polar coordinate system
phi(i,j) = U*rad(i,j)*cos(theta(i,j));
end
end
%plotting
contourf(xx,yy,psi,-1:0.2:1,'k','LineWidth',1.5), hold on�% plot stream function for range -1:0.1:1
contour(xx,yy,phi,-1:0.2:1,'r','LineWidth',1.5)% plot velocity potential for range -1:0.2:1
axis image, hold off
legend('streamlines','potential')
title('Uniform stream in x-direction')
xlabel('x-coordinate'), ylabel('y-coordinate')
axis square;
% end of Octave program
0 commentaires
Réponses (1)
Star Strider
le 1 Jan 2021
There is an invalid text character:
contourf(xx,yy,psi,-1:0.2:1,'k','LineWidth',1.5), hold on�% plot stream function for range -1:0.1:1
↑ ← HERE
If that is corrected (eliminated), your code appears to work (in MATLAB R2020b Update 3).
.
0 commentaires
Voir également
Catégories
En savoir plus sur Migrate GUIDE Apps dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!