Question

这个公式怎样用MATLAB作图,三维,求程序

Answer 1

d1=7.5;

d2=d1;

N=2;

M=2;

lumda=7.5;

k=2*pi/lumda;

[alpha,seta]=meshgrid(0:0.01:pi);

D=sin(k*M*d1/2*cos(alpha).*sin(seta)).*sin(k*M*d2/2*sin(alpha).*sin(seta))/M./sin(k*d1/2*cos(alpha).*sin(seta))/N./sin(k*d2/2*sin(alpha).*sin(seta));

mesh(alpha,seta,D)

xlabel('alpha');

ylabel('theta');

zlabel('D')