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Y 的代码
z_to_y.m
function Y=Z_to_Y(Z);
z11=Z(:,1,1);
z12=Z(:,1,2);
z21=Z(:,2,1);
z22=Z(:,2,2);
y11=z22;
y12=-z12;
y21=-z21;
y22=z11;
Y=[y11,y12;y21,y22]/det(Z);
y_to_s.m
function S=<mark>Y</mark>_to_S(<mark>y</mark>_param,Z0);
<mark>y</mark>11=<mark>y</mark>_param(1,1)*Z0;
<mark>y</mark>12=<mark>y</mark>_param(1,2)*Z0;
<mark>y</mark>21=<mark>y</mark>_param(2,1)*Z0;
<mark>y</mark>22=<mark>y</mark>_param(2,2)*Z0;
delta=(<mark>y</mark>11+1)*(<mark>y</mark>22+1)-<mark>y</mark>12*<mark>y</mark>21;
s11=(1-<mark>y</mark>11)*(1+<mark>y</mark>22)+<mark>y</mark>12*<mark> ...
y_to_z.m
function Z=Y_to_Z(Y);
y11=Y(1,1);
y12=Y(1,2);
y21=Y(2,1);
y22=Y(2,2);
z11=y22;
z12=-y12;
z21=-y21;
z22=y11;
Z=[z11,z12;z21,z22]/det(Y);
y_to_h.m
function H=Y_to_H(Y);
y11=Y(1,1);
y12=Y(1,2);
y21=Y(2,1);
y22=Y(2,2);
h11=1;
h12=-y12;
h21=y21;
h22=det(Y);
H=[h11,h12;h21,h22]/y11;
y_to_abcd.m
function ABCD=Y_to_ABCD(Y);
y11=Y(1,1);
y12=Y(1,2);
y21=Y(2,1);
y22=Y(2,2);
a=-y22;
b=-1;
c=-det(Y);
d=-y11;
ABCD=[a,b;c,d]/y21;