GRAPHICS_EXAMPLES, FORTRAN90 programs which illustrate how various kinds of data can be displayed and analyzed graphically.
These programs rely on the DISLIN package to set up the graphics output.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
GRAPHICS_EXAMPLES programs are available in a C version and a C++ version and a dataset version and a FORTRAN90 version and a MATLAB version and a Python version.
DISLIN, FORTRAN90 programs which illustrate the use of DISLIN, a scientific graphics package, by Helmut Michels.
GRAPHICS_EXAMPLES_CONVERT, examples which illustrate how various kinds of data can be processed and modified using the ImageMagick program convert() and its related tools.
GRAPHICS_EXAMPLES_GNUPLOT, examples which illustrate how various kinds of data can be displayed and analyzed graphically using the interactive executable graphics program gnuplot().
GRAPHICS_EXAMPLES_GRACE, examples which illustrate how various kinds of data can be displayed and analyzed graphically using the interactive executable graphics program grace().
GRAPHICS_EXAMPLES_PLOTLY, examples which illustrate how various kinds of data can be displayed and analyzed graphically, using the plotly() program from a browser.
MARIO, a FORTRAN90 program 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.
CIRCLE_INOUT depicts 500 pairs of (X,Y) data points in the unit square, 395 of which lie inside the unit circle, and 105 outside. If possible, the "inside" points should be blue, the "outside" points red, and the circle itself should also be drawn.
CORKSCREW generates (X,Y,Z) points that lie along a 3D curve looking something like a corkscrew. It creates data and command files suitable for input to gnuplot.
GEYSER contains the waiting time in minutes between successive eruptions of the Old Faithful geyser. 299 values are recorded. The data ranges from 43 to 108. It should be displayed in 14 bins of width 5 from 40 to 110. The data comes from Martinez and Martinez.
LISSAJOUS records 1000 points on a Lissajous curve defined by x=sin(3*t+pi/2), y=sin(4t). The curve is to be plotted and every tenth point marked.
LYNX records the yearly lynx harvest from 1821 to 1934. The graph should plot the data points as circles, and connect consecutive data points with straight line segments to suggest a curve.
MARIO makes a simple image of Mario, using colored squares.
ORBITAL records, on a 101x101 grid over [0,4*pi]x[0,4*pi], the minimum distance between two planets given a pair of orbital angles. A contour plot of this data is to be presented.
PREDATOR models the populations of predators (foxes) and prey (rabbits) over time, and then creates data and command files suitable for input to gnuplot.
SCATTER_PLOT generates 500 pairs of (X,Y) data, which lie in the unit square, and tend to cluster around (0.5,0.5).
SURFACE_GRID records, on a 41x41 grid over [-2,2]x[-2,+2], the values z = exp(-(x^2+y^2)) * cos(0.25*x) * sin(y) * cos(2*(x^2+y^2)). The data is to be plotted as a surface.
You can go up one level to the FORTRAN90 source codes.