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RRGRAPH is a package for producing "X-Y graphs" of scientific data and of functions. It provides features not found in other packages, such as data- or coordinate transformations and non-linear regression.
A few of RRGRAPH's features:
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- | Editing of a collection of points X,Y (and maybe Sigma), entered by keyboard or retrieved from disk.
ASCII files, e.g. a spreadsheet, can be used.
The standard deviation Sigma of point X,Y can be specified for each point separately or set constant, set proportional to Y or set as a function of X and/or Y.
A collection with up to 2046 points can be entered directly. If more data are available, RRGRAPH can average sequential groups of points first.
Scale X and/or Y of the points by a function of X and/or Y.
Create a collection by making X and/or Y a function of the sequence number (a built-in random generator is available).
Graph the data using one of over a hundred symbols, with or without error bars.
Smooth the collection of points X,Y by a Savitzky-Golay or another filter.
Draw a cubic spline through the collection of points X,Y. The endpoint strategy can be chosen. Points may be shown or deleted.
Draw a regression curve through the collection of points. The regression function of X may be linear or non-linear in its parameters. The maximum number of parameters is 5.
Again points may be shown or deleted.
Calculate the corresponding correlation coefficient and the ANOVA table.
Draw the 95% confidence region of the regression curve and/or of the next observation.
Draw a function of X, irrespective of data points.
Interpolate within the spline functions, the regression function or the user supplied function of X. Either way may be used: find Y for given X or search X for given Y.
Tabulate the collection of points X,Y(,Sigma) with the results of smoothing and/or splining and/or regression.
Automatic or user defined scaling of the axes. Linear and/or logarithmic axes can be used.
Title graph and axes, place labels anywhere inside or outside the graph. Three fonts, each in four sizes, are available.
Save image of graphic screen on disk, combine multiple graphs.
Reproduce your graphic screen on a dot matrix printer: four sizes available from RRGRAPH, a fifth by using SHIFT-PRTSC.
Export your graphic screen in Lotus (.PIC) or WordPerfect (.WPG) format. |
RRGRAPH is menu driven. The user decides the sequence in which information to and from computer is handled. To each choice a default answer is offered. The user can accept the answer by hitting the 'Return' key or overrule it by simply typing his own answer. An editor with error checking makes this simple!
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