[求助]matlab编程绘图，三角函数，菲涅尔 [复制链接]

程序有问题，在140.4、139.8、132等点处有异常值，请教一下大家怎么改，应该是Y=…那一步的式子有问题，谢谢
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Y值为负的那几个点是异常值 c(Y~5A{TXO  
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clc ][Tw
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clear _s#J\!F  
close all AUF[hzA  
nx = 0:0.6:150; z<t2yh(DF  
n = length(nx)-1; 9-j-nx @)  
figure Nz{q
u}dt  
xz = []; 'uz o[>p  
yz = []; FP{=b/  
for ii = 1:n Jityb}Z"  
    f=300; ,.{M1D6'R`  
    h=150-nx(ii); ;FwUUKj  
    b=atan(h/f); iDDq<a.A  
    d=(b/pi)*180 g
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    syms c $U ._4  
   Y=solve(sin(c-b)-1.494*sin(3*c-pi)==0,c); 2IHS)kkT|  
   C=double(Y); _\dC<K *>  
   e=(C/pi)*180; F6CuY$0m=  
    x=0:0.1:0.6; V 7~9z\lW  
    y=(0.6-x)*tan(C); ]Y$Wv9S6  
    xz = [xz x+nx(ii)] 'Sd+CXS  
    yz = [yz y]; D3g5#.$,}>  
    plot(xz,yz,'k-') >9nVR  
    hold on ]D@aMC$#  
    pause(0.01) 9BOn8p;yz  
end `TF3Ho\MC  
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