matlab问题，求大神指导

[qq_1572902205]

u=2.06;

H=50.2;

Q=0.93;
[x,y]=meshgrid(0:50:25000,-2000:50:2000);

sigy=0.0048+280.73*x.^0.9311-72.03*x.^1.074;

sigz=433.54+463.66*y.^2.1-443.91*y.^0.04;

C=Q./(pi*sigy.*sigz*u+eps).*exp(-0.5*(y./(sigy+eps)).^2).*exp(-0.5*(H./(sigz+eps)).^2);

figure
% plot3(x,c,y);%plot3（x,y,c)能正常显示，mesh(x,y,c)无法显示，
mesh(x,y,c)
% Error in ==> Untitled at 16 mesh(x,y,c)

xlabel('x'),ylabel('y'),zlabel('C')

[qq_1572902205]

找到答案了，C=Q./(pi*sigy.*sigz*u+eps).*exp(-0.5*(y./(sigy+eps)).^2).*exp(-0.5*(H./(sigz+eps)).^2); 这一句出现了复数，取实部就行了