Data analysis software

(1) Tracer 2.01

Tracer is a free graph digitizer program (author: Marcus Karolewski). Tracer addresses the problem of digitizing plotted data stored in graphical formats (the supported formats are *.bmp, *.jpg, *.gif, *.tif, *.png, *.wmf, *.emf). Graphics files of other formats can be used by pasting them into Tracer from the Windows clipboard. In addition, Tracer supports the "anti-digitization" process of plotting numeric data on image files. The download link for Tracer is at the bottom of this page. This version (August 2012) removes some minor interface annoyances that came to light in version 2.00.

(2) Spline2x

Spline2x (author: MAK) is a wrapper around the invaluable Spline2 program [authors: B. J. Thijsse, M. A. Hollanders, and J. Hendrikse, Computers in Physics 12 (1998) 393], that simplifies the drawing of smooth curves through noisy data sets. All science researchers should have it. Note: Spline2 has some undocumented idiosyncracies that cause it to crash (does not like negative x values or data duplicates). Data to be fitted are normally input in the form of a two-column numeric text file (three-column for some options). The download link for Spline2x is at the bottom of this page.