**poisson_simulation**,
a FORTRAN90 code which
simulates a Poisson process in which events occur uniformly at random,
with an average waiting time of Lambda,
creating output for graphics by gnuplot.

Note that the Poisson distribution therefore also describes the distribution of distances from one point to the next, assuming the points are distributed uniformly at random along a line, with average density Lambda per unit length.

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

**poisson_simulation** is available in
a C version and
a C++ version and
a Fortran90 version and
a MATLAB version and
an Octave version and
a Python version.

brownian_motion_simulation, a FORTRAN90 code which simulates Brownian motion in an M-dimensional region.

DUEL_SIMULATION, a FORTRAN90 code which simulates N repetitions of a duel between two players, each of whom has a known firing accuracy.

FAIR_DICE_SIMULATION, a FORTRAN90 code which simulates N tosses of 2 dice, making a histogram of the results.

gnuplot_test, FORTRAN90 codes which write data and command files so that gnuplot() can create plots.

HIGH_CARD_SIMULATION, a FORTRAN90 code which simulates a situation in which you see the cards in a deck one by one, and must select the one you think is the highest and stop; the program uses GNUPLOT for graphics.

ISING_2D_SIMULATION, a FORTRAN90 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.

ISING_3D_SIMULATION, a FORTRAN90 code which carries out a Monte Carlo simulation of an Ising model, a 3D array of positive and negative charges, each of which is likely to "flip" to be in agreement with neighbors.

REACTOR_SIMULATION, a FORTRAN90 code which a simple Monte Carlo simulation of the shielding effect of a slab of a certain thickness in front of a neutron source. This program was provided as an example with the book "Numerical Methods and Software."

THREE_BODY_SIMULATION, a FORTRAN90 code which simulates the behavior of three planets, constrained to lie in a plane, and moving under the influence of gravity, by Walter Gander and Jiri Hrebicek.

TWO_BODY_SIMULATION, a FORTRAN90 code which simulates the behavior of two bodies, constrained to lie in a plane, moving under the influence of gravity, with one body much more massive than the other, creating graphics files for processing by gnuplot.

- poisson_simulation.f90, the source code.
- poisson_simulation.sh, compiles the source code.