Write a function that calculates the ratio between the sum of the prime numbers lower or equal than x, and the sum of the non-prime numbers lower than x.
test case #2 is not correct.
Project Euler: Problem 6, Natural numbers, squares and sums.
Dimensions of a rectangle
Matlab Basics - Absolute Value
Matlab Basics II - Create a vector with a repeated entry
NaN (欠損値) が含まれている行を削除しよう
Approximate the inverse tangent by power series
Get the mean digit
Alternating 1´s and 0´s in a matrix
Ratio between sum of primes and sum of factors
Sum of a geometric series
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