Finding the indexes of multiple elements that are equal to a certain value in an array
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W=400;Lb=5;Lc=3;
% a)
D = (1:0.01:2.9);
T = Lb*Lc*W./(D.*sqrt(Lc^2-D.^2));
[t,d]=min(T);
Specifically, I need help finding the D values where T increases 10 percent above its minimum value. My initial approach was to try and find the indexes of the elements in D that are equal to 1466.67, which is 10 percent above the function's minimum value, then plug them into D to find out what values those indexes correspond to. I've searching on here, and have tried using the find() command and the ismembertol() command, to no avail. I am probably using them wrong anyways, and would greatly appreciate any help in solving my problem.
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Christopher Abel
2018-9-25
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Walter Roberson
2018-9-25
You will not find any place where they are exactly equal. Do you need to find all that are above the threshold, or all below, or do you need to find the transition boundaries?
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