Box Plot of Primes

PRIME_PLOT, a MATLAB program which displays a "box plot" of the prime and composite numbers.

An N by N grid A of squares is displayed. If N is prime, then the squares A(N,1:N) are red. If N is composite, then A(N,D) is blue for each divisor of N.


prime_plot ( 'n_max' )


The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.


PRIME_PLOT is available in a MATLAB version.

Related Data and Programs:

BOX_DISPLAY, a MATLAB program which displays a box plot, over integer pairs of data, of a function defined by two formulas.

PRIME, a MATLAB program which counts the number of primes between 1 and N, intended as a starting point for the creation of a parallel version.


Source Code:

Last revised on 06 March 2019.