📄 per.m
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function y = per(cs,x)
if (cs==1)
p1 = -1.8636e-007;
p2 = 1.3651e-005;
p3 = -0.00038707;
p4 = 0.005055;
p5 = -0.02464;
p6 = -0.05627;
p7 = 0.67805;
y = p1.*x.^6 + p2.*x.^5 + p3.*x.^4 + p4.*x.^3 + p5.*x.^2 + p6.*x.^1 + p7;
end
if (cs==2)
p1 = -5.0692e-007;
p2 = 3.7424e-005;
p3 = -0.0011104;
p4 = 0.016522;
p5 = -0.12082;
p6 = 0.2939;
p7 = 0.59118;
y = p1.*x.^6 + p2.*x.^5 + p3.*x.^4 + p4.*x.^3 + p5.*x.^2 + p6.*x.^1 + p7;
end
if (cs==3)
p1 = -3.6305e-005;
p2 = 0.0017444;
p3 = -0.024901;
p4 = 0.044283;
p5 = 0.92058;
y = p1.*x.^4 + p2.*x.^3 + p3.*x.^2 + p4.*x.^1 + p5;
end
if (cs==4)
p1 = -2.2288e-007;
p2 = 1.3595e-005;
p3 = -0.00030003;
p4 = 0.0030644;
p5 = -0.019477;
p6 = 0.061419;
p7 = 0.93221;
y = p1.*x.^6 + p2.*x.^5 + p3.*x.^4 + p4.*x.^3 + p5.*x.^2 + p6.*x.^1 + p7;
end
index=find(x<2);
y(index)=1;
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