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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V4.1//EN">
<refentry>
<refentryinfo>
<date>2007-03-16</date>
</refentryinfo>
<refmeta>
<refentrytitle>
<application>g3data</application>
</refentrytitle>
<manvolnum>1</manvolnum>
<refmiscinfo>g3data 1.5.1</refmiscinfo>
</refmeta>
<refnamediv>
<refname>
<application>g3data</application>
</refname>
<refpurpose>
A tool for extracting data from graphs.
</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>g3data</command>
<arg><option>-max<replaceable> x y</replaceable></option></arg>
<arg><option>-scale<replaceable> factor</replaceable></option></arg>
<arg><option>-coords<replaceable> llx lly rux ruy</replaceable></option></arg>
<arg><option>-errors</option></arg>
<arg><option>-lnx</option></arg>
<arg><option>-lny</option></arg>
<arg><option><replaceable>filename(s) ...</replaceable></option></arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<refsect1info>
<date>2001-01-01</date>
</refsect1info>
<title>DESCRIPTION</title>
<para>
<command>g3data</command> is a tool for extracting data
from scanned graphs. For graphs published in scientific articles
the actual data is usually not explicitly given ; g3data makes the
process of extracting this data easy.
</para>
</refsect1>
<refsect1>
<title>OPTIONS</title>
<variablelist>
<varlistentry>
<term><option>-max <replaceable>x y</replaceable></option>
</term>
<listitem>
<para> If picture is larger x-wise than x or y-wise than y,
the picture is scaled down accordingly otherwise this
parameter has no effect.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-scale <replaceable>factor</replaceable></option>
</term>
<listitem>
<para>Scales the picture size by factor. This parameter nullifies
effect of the -max parameter.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-coords <replaceable>llx lly rux ruy</replaceable></option>
</term>
<listitem>
<para> Preset the coordinates of the left lower (ll) corner
and the right upper (ru) corner.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-errors</option>
</term>
<listitem>
<para>Print out the error of the x value in column 3 and the
error of y value in column 4 of the output. </para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-lnx</option>
</term>
<listitem>
<para>Use logarithmic scale for x coordinates.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-lny</option>
</term>
<listitem>
<para>Use logarithmic scale for y coordinates.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option><replaceable>filename(s) ...</replaceable></option></term>
<listitem>
<para>The filename(s) of the image(s) to open.
Supported image formats: PNG, XPM, JPEG, TIFF, PNM, RAS, BMP and
GIF.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>USAGE</title>
<para>
<command>g3data</command> -scale 2 -errors test1.png
</para>
<para>
<command>g3data</command> -scale 2 -lny -errors test2.png
</para>
</refsect1>
<!-- <refsect1>
<title>CAVEATS</title>
<para>
Other programs named <command>g3data</command> may exist and actually
do something!
</para>
</refsect1> -->
<refsect1>
<title>BUGS</title>
<para>
None known.
</para>
</refsect1>
<refsect1>
<title>AUTHOR</title>
<para>
<author>
<firstname>Jonas </firstname>
<surname>Frantz </surname>
<email>jonas.frantz@welho.com</email>
</author>
</para>
</refsect1>
</refentry>
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