MATLAB: How to find first ten prime numbers that are greater than 4

arrayprimes

Hi,

How am I going to make an array that consists of first 10 prime numbers that are greater than 4 as follows?

 a=[5 7 11 13 17 19 23 29 31 37]

Thank you.

Best Answer

You could do it like this

x = primes(100); %pick primes smaller than, say 100
x = x(x>4); %pick the ones larger than 4
x(1:10) %pick the first ten of those

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MATLAB: How to find prime numbers

Hi,

A=primes(50); A(length(primes(25))+1:end)

Dave

MATLAB: How to create a list where it shows the values from the list 1:N so that in the list it says which numbers are prime

Try this:

N = 55;
primeNumbers = primes(N)
fprintf('list: ');
for k = 1 : N
	fprintf('%d', k);
	if ismember(k, primeNumbers)
		fprintf(' (prime), ');
	else
		fprintf(', ');
	end
end

You get in the command window:

list: 1, 2 (prime), 3 (prime), 4, 5 (prime), 6, 7 (prime), 8, 9, 10, 11 (prime), 12, 13 (prime), 14, 15, 16, 17 (prime), 18, 19 (prime), 20, 21, 22, 23 (prime), 24, 25, 26, 27, 28, 29 (prime), 30, 31 (prime), 32, 33, 34, 35, 36, 37 (prime), 38, 39, 40, 41 (prime), 42, 43 (prime), 44, 45, 46, 47 (prime), 48, 49, 50, 51, 52, 53 (prime), 54, 55,

How's that? If you need to not print the final trailing comma, you can print a backspace.

Best Answer

Related Solutions

MATLAB: How to find prime numbers

MATLAB: How to create a list where it shows the values from the list 1:N so that in the list it says which numbers are prime

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