Define variable based on input condition
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I have a function which calculates two possible output values (psi positive or negative) for a given input value (th2) as th2 sweeps from 0 to 360.
th2 = 0: 0.1: 360;
A = 2*a*c.*cosd(th2)-2*d*c;
B = 2*a*c.*sind(th2);
C = (d^2) + (c^2) + (a^2) - (b^2) - (2*a*d.*cosd(th2)) ;
psi_pos = (atan2d(B,A) + acosd(C ./ (sqrt((A.^2) + (B.^2)))));
psi_neg = (atan2d(B,A) - acosd(C ./ (sqrt((A.^2) + (B.^2)))));
The outputs for psi_pos and psi_neg are 1x3601 doubles,
I want a final variable psi defined as
psi_pos when 0 < th2 < 180
psi_neg when 180 < th2 < 360
So I can then plot one continuous function (psi vs th2)
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Accepted Answer
madhan ravi
on 15 Nov 2023
Edited: madhan ravi
on 15 Nov 2023
psi = ((0 <= th2) & (th2 < 180)) .* psi_pos + ((180 <= th2) & (th2 < 360)) .* psi_neg;
plot(th2, psi)
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