index problem while sort
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VINAY PRAJAPATI
on 1 Feb 2024
Moved: Walter Roberson
on 1 Feb 2024
I am trying to sort some positive values from one array and finding the index of that.
Omega=[1.528 -1.528 0.792 -0.792];
[NN,ind]=sort(Omega(Omega>=0));
Answer:
NN=[0.792 1.528]
but
ind=[2,1] is coming which is wrong. It should ind=[3,1].
Please help regarding this.
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Accepted Answer
Dyuman Joshi
on 1 Feb 2024
Edited: Dyuman Joshi
on 1 Feb 2024
"ind=[2,1] is coming which is wrong."
It is correct.
The input to sort() only has 2 elements, so the expectation to get [3 1] as the output is misplaced -
Omega=[1.528 -1.528 0.792 -0.792];
Omega(Omega>=0)
I assume you want to get the indices of these particular values from the original array, in that case, try this -
NN=sort(Omega(Omega>=0))
[~,idx] = ismember(NN,Omega)
However, the values here are obtained directly from the original array via indexing, so ismember() works here.
More Answers (1)
VBBV
on 1 Feb 2024
Moved: Dyuman Joshi
on 1 Feb 2024
Here is another way to get the indices without overhead of using ismember function
Omega=[1.528 -1.528 0.792 -0.792];
[NN,ind]=sort(Omega)
ind(NN>0)
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