How can I discretize data by their sign?

1 visualizzazione (ultimi 30 giorni)
I would like to discretize data by their sign and return the index of 'alternating sign'.
For example if I have a vector:
A = [-2,-1,5,-10,7,3,-9,-12,11];
Their signs are like:
s = sign(A)
[-1,-1,1,-1,1,1,-1,-1,1]
I would like to return:
[1,1,2,3,4,4,5,5,6]

Risposta accettata

Stephen23
Stephen23 il 20 Set 2022
A = [-2,-1,5,-10,7,3,-9,-12,11];
B = sign(A);
C = cumsum(logical([1,diff(B)]))
C = 1×9
1 1 2 3 4 4 5 5 6

Più risposte (1)

Chunru
Chunru il 20 Set 2022
A = [-2,-1,5,-10,7,3,-9,-12,11];
s = sign(A)
s = 1×9
-1 -1 1 -1 1 1 -1 -1 1
s1 = [1 diff(s)~=0]
s1 = 1×9
1 0 1 1 1 0 1 0 1
y = cumsum(s1)
y = 1×9
1 1 2 3 4 4 5 5 6
% [1,1,2,3,4,4,5,5,6]

Categorie

Scopri di più su MATLAB Compiler in Help Center e File Exchange

Prodotti


Release

R2022b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by