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greg |
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.\" RCSid "$Id" |
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.TH GCOMP 1 6/24/98 RADIANCE |
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.SH NAME |
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gcomp - do computations on a graph file. |
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.SH SYNOPSIS |
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.B gcomp |
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[ |
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.B -amilh |
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][ |
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.B +variable value .. |
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][ |
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.B file .. |
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] |
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.SH DESCRIPTION |
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.I Gcomp |
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reads each graph |
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.I file |
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in sequence and computes the specified calculations. |
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The type options are as follows: |
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.TP 10n |
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.BR \-n |
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Print the name of each curve. |
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.TP |
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.BR \-a |
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Print average and standard deviation of each curve. |
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.TP |
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.BR \-m |
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Print minimum and maximum for each curve. |
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.TP |
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.BR \-i |
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Print Romberg's approximation to the integral of each curve. |
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.TP |
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.BR \-l |
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Print the slope, intercept, and correlation coefficient using |
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the least squares method of linear regression. |
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.TP |
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.BR \-h |
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Do not print a header in the output. |
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.PP |
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The calculations will be displayed as columns in the order |
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they are specified on the command line. |
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If no files are given, the standard input is read. |
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.PP |
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Variables can be set explicitly with |
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.I +variable value |
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options. |
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The only truely useful variables for this program |
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are xmin and xmax. |
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They determine boundaries for the calculations. |
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.SH EXAMPLE |
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To compute the approximate integral of sin(x)/log(x) from 2 to 4: |
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.nf |
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gcomp -i |
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A(x)=sin(x)/log(x); |
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Anpoints=100; |
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xmin=2; |
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xmax=4; |
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^D |
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.fi |
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.SH AUTHOR |
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Greg Ward |
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.SH BUGS |
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Only the y values can be used for computation. |
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.SH "SEE ALSO" |
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bgraph(1), calc(1), dgraph(1), igraph(1) |
