Try to answer bonus question

Screenshot is attached. Comment what the code to the bonus question is. Also provide explanations.

Answer 1

[Birdman]

By using primes built in function of MATLAB:

function y=prime_count(n)
y=numel(primes(n));
plot(primes(n))
end

From command line:

prime_count(10)

>>   4

[Raiven Balderas]

what happened to the k? it doesn't go in the code? the question says to plot pi(k) vs k for k=2,3,4..10^6

?

[Birdman]

Use this:

plot((1:numel(primes(n)))+1,primes(n),'-o')

[Birdman]

It does plot. For instance:

n=10;
plot((1:numel(primes(n)))+1,primes(n),'-o')

and check the attached figure.