FORTRAN POPPAR Equivalent in Matlab
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Juan Navarro
am 9 Jul. 2021
Bearbeitet: Juan Navarro
am 9 Jul. 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!
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Walter Roberson
am 9 Jul. 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)
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