FORTRAN POPPAR Equivalent in Matlab
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Juan Navarro
le 9 Juil 2021
Modifié(e) : Juan Navarro
le 9 Juil 2021
Hello Matlab comunity, my question is what would be the equivalent to FORTRAN POPPAR function in Matlab?
According to gnc webpage, POPPAR(I) returns parity of the integer I, i.e. the parity of the number of bits set ('1' bits) in the binary representation of I. It is equal to 0 if I has an even number of bits set, and 1 for an odd number of '1' bits.
Thank you!
0 commentaires
Réponse acceptée
Plus de réponses (1)
Walter Roberson
le 9 Juil 2021
bitget() can be faster.
I = randi([0 2^32-1], 1, 1, 'uint32')
timeit(@() mod(nnz(dec2bin(I)-'0'),2),0)
timeit(@() fold(@xor, dec2bin(I) - '0', 0), 0)
timeit(@() fold(@xor, bitget(I, 1:32), 0), 0)
timeit(@() mod(sum(bitget(I,1:32)),2),0)
1 commentaire
Voir également
Catégories
En savoir plus sur Fortran with MATLAB dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!