Looping over Only the Real Positive Roots
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In my model, I am searching for a value of one variable, let's call it a, over an interval. To find the best value of this variable, I need to find the five roots of another variable, let's call it b, and search over each of the positive real roots.
When only one of the roots is real, the process is simple. My issue is that I don't know how to only select the positive roots of b and loop through each of those only.
Anyone have any suggestions?
Thanks.
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Walter Roberson
le 26 Mai 2012
RB = roots(b);
PRR = RB( imag(RB) == 0 & real(RB) > 0 );
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