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.\" RCSid "$Id: gcomp.1,v 1.3 2004/01/01 19:31:44 greg Exp $"
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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), dgraph(1), icalc(1), igraph(1)
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