mario, a C code which creates a file of commands to GNUPLOT that can be used to plot a sort of "needlepoint" image of Mario, as an array of colored squares.
The computer code and data files described and made available on this web page are distributed under the MIT license
mario is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.
gnuplot_test, C codes which illustrate how a program can write data and command files so that gnuplot can create plots of the program results.
ISING_2D_SIMULATION, a C code which carries out a Monte Carlo simulation of an Ising model, a 2D array of positive and negative charges, each of which is likely to flip to be in agreement with neighbors, using gnuplot to make images of the initial and final configurations.