**g3data** — A tool for extracting data from graphs.

**g3data** [

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

**-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.

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

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

None known.

Jonas Frantz jonas.frantz@welho.com