Category Archives: AlgLib

Daily Download 13: The ALGLIB maths library and Excel

Posted on 30/09/2012 by dougaj4

Today we move onto maths related downloads, starting with the ALGLIB maths library, which has featured here quite frequently: Original post with link to site: ALGLIB Installing AlgLib with Excel VBA Download files: http://interactiveds.com.au/software/AL-Matrix-xlsb.zip   http://interactiveds.com.au/software/AL-Matrix-xls.zip Linking AlgLib C++ to Excel … Continue reading →

Posted in AlgLib, Arrays, Excel, Maths, Newton, Numerical integration, UDFs, VBA | Tagged , , , , , , , | 7 Comments

Alglib Spline Functions 1.32

Posted on 23/07/2012 by dougaj4

Following a comment to AlgLib Spline Functions, the AL-Spline-Matrix spreadsheets have been updated, and may be downloaded from AL-Spline-Matrix03 for Excel 2003 and earlier and AL-Spline-Matrix07 for Excel 2007 and 2010.

Posted in AlgLib, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , , , , , | Leave a comment

Non linear regression – 2; ALGLIB functions

Posted on 05/03/2011 by dougaj4

The previous post looked at using the Excel Solver to fit a non-linear equation to a given set of data, using the least squares method.  This approach is reasonably convenient and straightforward, but it has a number of disadvantages: The … Continue reading →

Posted in AlgLib, Concrete, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , | 8 Comments

Non linear regression – 1

Posted on 01/03/2011 by dougaj4

Recent posts have described how to fit linear equations (or equations that can be made linear) to a set of data, using the Excel Linest functions, or User Defined Functions (UDF’s) linking to the ALGLIB library (see Using LINEST for non-linear … Continue reading →

Posted in AlgLib, Concrete, Excel, Maths, Newton | Tagged , , , | 6 Comments

ALGLIB linear and polynomial fitting functions

Posted on 17/02/2011 by dougaj4

As promised here: Fitting high order polynomials this post presents details of four Excel User Defined Functions (UDFs) linking with ALGLIB functions for least squares fitting of linear and polynomial functions.  The new functions are: AL_Linest: AL_LinestCW: AL_PolyFit: and AL_PolyFitCW: These functions have been added … Continue reading →

Posted in AlgLib, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , | 5 Comments