Error in using contourf
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
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 Kommentare
Antworten (1)
Star Strider
am 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 Kommentare
Siehe auch
Kategorien
Mehr zu Migrate GUIDE Apps finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!