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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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19
Task/Primality-by-trial-division/MATLAB/primality-by-trial-division-1.m Normal file
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function isPrime = primalityByTrialDivision(n)
if n == 2
isPrime = true;
return
elseif (mod(n,2) == 0) || (n <= 1)
isPrime = false;
return
end
%First n mod (3 to sqrt(n)) is taken. This will be a vector where the
%first element is equal to n mod 3 and the last element is equal to n
%mod sqrt(n). Then the all function is applied to that vector. If all
%of the elements of this vector are non-zero (meaning n is prime) then
%all() returns true. Otherwise, n is composite, so it returns false.
%This return value is then assigned to the variable isPrime.
isPrime = all(mod(n, (3:round(sqrt(n))) ));
end

5
Task/Primality-by-trial-division/MATLAB/primality-by-trial-division-2.m Normal file
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>> arrayfun(@primalityByTrialDivision,(1:14))
ans =
0 1 1 0 1 0 1 0 0 0 1 0 1 0