Spherical coordinates to cartesian
11 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
I am plotting the antenna pattern in a 3D plot where two axis are representing the theta and phi coordinates. Now I would like to change the plot in order to be able to have real 3D plot in the xyz coordiantes system,
I tried to use the sph2cart function, but I am getting weird results.
Can someone help me please?
surf(phi0rad*180/pi,theta0rad*180/pi,(abs(rho.')))
colorbar
xlabel('\phi')
ylabel('\theta')
shading interp
%%
[az, el]=meshgrid(phi0rad*180/pi, theta0rad*180/pi);
[x,y,z]=sph2cart(az,el,rho_2.');
surf(x,y,z)
I attach also a picture of what I am trying to obtain.
Thanks.
0 commentaires
Réponses (1)
Steven Lord
le 28 Mar 2020
From the documentation "azimuth is the counterclockwise angle in the x-y plane measured in radians from the positive x-axis." and "elevation is the elevation angle in radians from the x-y plane."
Are your angles in radians or degrees?
2 commentaires
Steven Lord
le 28 Mar 2020
From the fact that the names of the variables you're multiplying by 180/pi in your meshgrid calls imply that those variables are in radians (meaning you're gridding degree data) I don't think you calling sph2cart with angles in radians. You're trying to convert the gridded degree data.
Voir également
Catégories
En savoir plus sur Surface and Mesh Plots 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!