Convert Logical into Sequential Index Vector
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I am looking for a simple way to convert a logical vector in a sequential vector of doubles whose values are the indices of true in the logical vector. For example, let's say x is a 1x8 logical vector:
x = [0 1 0 0 1 1 1 0]
The result I am looking for would be y:
y = [2 5 6 7]
I know this can be done with a for loop, but was curious if there is a clever one-liner.
More Answers (1)
Gabor on 25 Jun 2021
What if we want to do the exact opposite?
We have y = [2 5 6 7] and we want to create x = [0 1 0 0 1 1 1] without loop?
than we get our logical vector array without loop from a list of indexes
1×7 logical array
0 1 0 0 1 1 1
I hope it helps someone, it took me sometime to figure this out.
Keywords: create logical vector from array of indexes, from index array, from idx, from vector of indexes.