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