Drawing upside down cone using spherical coordinates.
6 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Viktor Karlsson
el 30 de Abr. de 2021
Comentada: Viktor Karlsson
el 3 de Mayo de 2021
I wrote the following code:
phi=pi/6;
theta=linspace(0,2*pi,63); %Theta goes from 0 to 2*pi.
a=linspace(0,1,21);
[PHI,THETA,A]=meshgrid(phi,theta,a);
X=A.*sin(PHI).*cos(THETA); % Spherical coordinates
Y=A.*sin(PHI).*sin(THETA);
Z=A.*cos(PHI);
surf(X,Y,Z)
axis equal
It won't draw, but instead gives me an empty 2D graph.
The error message is:
Error using matlab.graphics.chart.primitive.Surface
Value must be a vector or 2D array of numeric type.
hh = matlab.graphics.chart.primitive.Surface(allargs{:});
0 comentarios
Respuesta aceptada
Benjamin Kraus
el 30 de Abr. de 2021
The issue you are facing is that when you call meshgrid you are specifying three input vectors, so the output matrices are going to be 3D matrices, but surf only accepts 2D matrices.
My recommendation is to remove phi from the call to meshgrid:
phi=pi/6;
theta=linspace(0,2*pi,63);
a=linspace(0,1,21);
[THETA,A]=meshgrid(theta,a);
X=A.*sin(phi).*cos(THETA);
Y=A.*sin(phi).*sin(THETA);
Z=A.*cos(phi);
surf(X,Y,Z)
axis equal
Más respuestas (0)
Ver también
Categorías
Más información sobre Surface and Mesh Plots en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!