TM Goal Seek

TM Goal Seek enhances the existing user interface to Excel’s Goal Seek feature. The built in Goal Seek is a simple optimization tool that suffices for a large number of scenarios. The UI, unfortunately, is extremely unwieldy and unfriendly. TM Goal Seek is a simple add-in that is easier to use than the default dialog box because of three critical benefits:

  1. The target value can be a number or a reference to a cell that contains a number,
  2. The add-in retains values previously entered in the dialog box, and
  3. One can interact with the worksheet even with the dialog box open.

The motivation to develop the add-in came from work I was doing for a client that involved risk analysis on multiple investment scenarios of financial derivative trades. The default Goal Seek interface took way too long.

The current version of the add-in will expire on May 1, 2013.

For more see http://www.tushar-mehta.com/excel/software/goal_seek/index.htm

Tushar Mehta

Fitting curves to your data using least squares

Introduction

If you’re an engineer (like I used to be in a previous life), you have probably done your bit of experimenting. Usually, you then need a way to fit your measurement results with a curve. If you’re a proper engineer, you also have some idea what type of equation should theoretically fit your data.

Perhaps you did some measurements with results like this:

Data with fitted equation

I’ve created an Excel file with which you can fit curves to your data, check out the article on my website:

Fitting curves to your data using Least Squares

Enjoy!

Regards,

Jan Karel Pieterse

http://www.jkp-ads.com/