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.\" RCSid "$Id: dgraph.1,v 1.2 2003/12/09 15:59:06 greg Exp $"
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.TH DGRAPH 1 6/24/98 RADIANCE
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.SH NAME
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dgraph - do a set of graphs to a dumb terminal
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.SH SYNOPSIS
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.B dgraph
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[
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.B -w width
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][
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.B -l length
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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 Dgraph
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reads each graph
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.I file
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in sequence and converts it to a character plot
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displayable on any ascii device.
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If no files are given, the standard input is read.
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.PP
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Across the top of the plot, the extrema are printed.
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This is the only indication of the axis size.
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Curves are represented with their respective letter ('A' for
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curve A, etc.) at each point.
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Where two or more curves cross, a number is shown instead.
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.PP
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The size of the output array can be specified as a
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certain
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.I width
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and
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.I length.
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The default size is 79 by 22.
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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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See bgraph(1) for details.
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.SH EXAMPLE
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To get a quick glimpse of the sine function from 0 to 4.
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.nf
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dgraph
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A(x)=sin(x)
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Anpoints=100
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xmin=0
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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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There is no mechanism provided for undefining a variable.
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.SH "SEE ALSO"
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bgraph(1), gcomp(1), icalc(1), igraph(1)
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