[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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图片:})WX7H~ND~3OE[$Y(~WEX_R.png

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Y值为负的那几个点是异常值 ?*(r1grHl  
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clc 8N</Yi|n  
clear >F_qa=t%[  
close all Qq@_Z=mt  
nx = 0:0.6:150; <yPq;#z(!  
n = length(nx)-1; H'j_<R N  
figure g]oc(RM  
xz = []; /gMa"5?,  
yz = []; 3Qm t]q  
for ii = 1:n *B)Jv9  
    f=300; >e5q2U   
    h=150-nx(ii); .If"'hMY  
    b=atan(h/f); VNJDl  
    d=(b/pi)*180 L<{OBuR  
    syms c c%6 @ z  
   Y=solve(sin(c-b)-1.494*sin(3*c-pi)==0,c); /ynKKJx<Y  
   C=double(Y); oho AUT  
   e=(C/pi)*180; Q 37V!  
    x=0:0.1:0.6; ]
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    y=(0.6-x)*tan(C); \Nh^Ig
 
    xz = [xz x+nx(ii)] ?Oe_} jv;  
    yz = [yz y]; fwar8 i1  
    plot(xz,yz,'k-') \(3Qqbw  
    hold on |e.3FjTH  
    pause(0.01) '? !7 Be  
end w
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