Prime number function Help!

Hi I am trying to write a code that takes in a vector of doubles and return only prime numbers. I understand I can do this by using isprime() function but I want to try it wo using that function. Could you show me how to do it by using loops?

Answer 1

[KSSV]

If A is your array,

iwant = A(isprime(A))

[gmltn1212]

I am not trying to use isprime function!

[KSSV]

This is discussed lot of times.....you search in mathworks google. You will get many links.

https://in.mathworks.com/matlabcentral/answers/306336-i-need-a-program-to-check-prime-numbers