determine location of numbers within a vector

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anton delehony
anton delehony el 20 de Nov. de 2015
Respondida: Thorsten el 20 de Nov. de 2015
Hi, I have a vector
x=[345 3433 20 5345 3533 21 3453453 34534 345345 22 234];
I'm looking for the fastest way to find the location of a numbers that starts from 20 and increase by one. In this toy example the output would be y=[3 6 10];
In reality the size of vector x for me can be 2 billion so I'm looking for a fast way to get y. Thanks for your suggestions.

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Thorsten
Thorsten el 20 de Nov. de 2015
ind = arrayfun(@(val) find(val == x), 20:22)

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