RANDOM_DATA - Generation of random data

RANDOM_DATA generates sets of data points using certain random number distributions, in a given dimension, and in a given physical region. It can write the resulting list of data points to an XY point file, which, in turn, can be displayed by PLOT_POINTS or other graphics programs.

Files you may copy include:

• random_data.f90, includes some routines to create random data sets and write them to a text file.
• random_data_prb.f90, tests the routines.

Data files and plots you may copy include:

• brownian.txt, a sample set of Brownian points.
• normal.txt, a sample set of normal points.
• uniform_annulus01.txt, uniformly random points in an annulus.
• uniform_block01.txt, uniformly random points in a unit block.
• uniform_sphere01.txt, uniformly random points in a sphere.

Plots you may copy include:

• brownian.ps.
• normal.ps.
• uniform_annulus01.ps.
• uniform_block01.ps.
• uniform_sphere01.ps.

The list of routines includes:

• CREATE_BROWNIAN creates a random sequence of Brownian points.
• CREATE_UNIFORM_ANNULUS01 creates a random set of points in a unit annulus.
• CREATE_UNIFORM_CIRCLE_01 creates a random set of points in the unit circle.
• CREATE_UNIFORM_SQUARE01 creates a random set of points in the unit square.
• GET_UNIT returns a free FORTRAN unit number.
• NORMAL_01_SAMPLE samples the standard normal probability distribution.
• RESCALE_CIRCLE01 translates and rescales data to fit in the unit circle.
• RESCALE_SQUARE01 translates and rescales data to fit in the unit square.
• WRITE_CLOSE closes a file that was written.
• WRITE_DATA writes out a vector of X, Y data.
• WRITE_OPEN opens a file to be written.

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