An XY plotting tool

Grace is a point-and-click tool that allows the user to draw X-Y plots. This is the program formerly known as Xmgr.

A few of its features are: User defined scaling, tick marks, labels, symbols, line styles, colors. Polynomial regression, splines, running averages, DFT/FFT, cross/auto-correlation. Batch mode for unattended plotting. Hardcopy support for PostScript, FrameMaker and several image formats.

http://packages.debian.org/squeeze/grace

http://plasma-gate.weizmann.ac.il/Grace/