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Tracker 4.90

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Tracker version 4.90 now available
Douglas Brown Avatar
Douglas Brown
339 Posts

Hi Tracker users,

Tracker 4.90 installers for Windows, Mac and Linux are now available from both the Tracker home page (http://physlets.org/tracker/) and ComPADRE (http://www.opensourcephysics.org/items/detail.cfm?ID=7365).

Note that the Tracker website is now hosted on the physlets.org domain (http://physlets.org/tracker/). Please change the Tracker bookmarks/favorites in your browsers to point to this new site. (Soon--hopefully--your browsers will be automatically redirected to the new site from the old one at https://www.cabrillo.edu/~dbrown/tracker/.)

Some of the changes in this release are listed below. For a more complete list, see the Change Log at http://physlets.org/tracker/change_log.html

  • new circle fitter tool fits a circle to a set of points
  • new fit function autoloading with autoload manager in Data Tool
  • new data shifting in Data Tool
  • new user-settable descriptions of parameters and functions in data builder, model builder and fit builder
  • improved user control of font, icon and footprint sizes
  • improved data function autoloading with autoload manager

There are also a number of bug fixes in this new version. Please contact me if (when?) you discover any bugs in it ;-) And as always, I invite you to contact me with new ideas for improving Tracker!

best regards,


OSP Projects:
Open Source Physics - EJS Modeling
Physlet Physics
Physlet Quantum Physics
STP Book