How do i extract only prime numbers from a matrix

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Vc27 2022-11-18

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https://ww2.mathworks.cn/matlabcentral/answers/1855393-how-do-i-extract-only-prime-numbers-from-a-matrix

评论： Vc27 2022-11-18

I have a row vector with 100 variables and i want to extract all the prime numbers in this, is there a simple way to do this? thanks in advance

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Answer 1

Stephen23 2022-11-18

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https://ww2.mathworks.cn/matlabcentral/answers/1855393-how-do-i-extract-only-prime-numbers-from-a-matrix#answer_1104203

在 MATLAB Online 中打开

V = randi(1000,1,100) % fake data
V = 1×100
   920   211   723     2   758   106   665   423   252    67   473   947   500   168   294   520   667   139   896   372   309   631   401   721   922   302   799   428   496   743
P = V(isprime(V)) % the prime values
P = 1×14
   211     2    67   947   139   631   401   743    53   181    47   521   449    71