Efficiently find a value in a matrix
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John Gilmore
il 26 Mar 2021
Commentato: John Gilmore
il 29 Mar 2021
Hey all,
So I have a simple 1D matrix that I'm trying to find a specific value in. I know of a way to do it, but my main question is if anyone knows of a more effcient way? As of current, I'm using as part of an operation that occurs on the order of millions or even billions of times, and using the matlab profiler it's told me that this is far and beyond the most inefficient part of the whole process.
This is how I currently do it...the third line take up ~60% of my run time
DummyData = [1,3,5,7,9];
ValueToFind = 3;
[~,Index] = min(abs(DummyDaya - ValueToFind));
2 Commenti
Stephen23
il 26 Mar 2021
If you want to "find a specific value" why are you using code that just finds the closest value?
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weikang zhao
il 27 Mar 2021
From the perspective of computational complexity, your code can no longer be optimized. You can seek help from GPU acceleration or parallel computing.
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