Problem 14. Find the numeric mean of the prime numbers in a matrix.
2 is prime, so the example solution should be (2+3+5)/3 = 3.33....
+1, the example is wrong :(
*blushing* Oops! At least we got the actual test suite right. Thanks for the notes. Fixed it.
i didn't understand the problem
I don't understand why this doesn't work for test 3: out=sum(in.*isprime(in))/sum(isprime(in))
it works for all other tests but test 3 requires an answer of 3 and the code gives an answer of 3.0000. Can anyone tell me why?
The question topic is hard to understand.
Good Problem for beginners.
What is wrong with
a = find( isprime( in))
out = mean( in( a)) ?
It works perfectly in my own MATLAB environment
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Return the 3n+1 sequence for n
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