### g3data (1)

#### NAME

**g3data**

`---`

`A tool for extracting data from graphs.`

#### SYNOPSIS

**g3data** [**-max*** x y*] [**-scale*** factor*] [**-coords*** llx lly rux ruy*] [**-errors**] [**-lnx**] [**-lny**] [*filename(s) ...*]

#### DESCRIPTION

2001-01-01;
**g3data** 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.

#### OPTIONS

**-max***x y*- 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.
**-scale***factor*- Scales the picture size by factor. This parameter nullifies effect of the -max parameter.
**-coords***llx lly rux ruy*- Preset the coordinates of the left lower (ll) corner and the right upper (ru) corner.
**-errors**- Print out the error of the x value in column 3 and the error of y value in column 4 of the output.
**-lnx**- Use logarithmic scale for x coordinates.
**-lny**- Use logarithmic scale for y coordinates.
*filename(s) ...*- The filename(s) of the image(s) to open. Supported image formats: PNG, XPM, JPEG, TIFF, PNM, RAS, BMP and GIF.

#### USAGE

**g3data** -scale 2 -errors test1.png

**g3data** -scale 2 -lny -errors test2.png

#### BUGS

None known.

#### AUTHOR

Jonas Frantz jonas.frantz@welho.com ` `