g3data

1 g3data 1.5.1

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

## DESCRIPTION

`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