Category Archives: Newton

Laterally Loaded Piles and a Safety Device for Walking on Icy Pavements

Posted on 19/03/2011 by dougaj4

What do laterally loaded piles: and a safety device for walking on icy pavements: have in common? Apart from their obvious utility, both are the subject of learned papers, freely available at the Virginia Tech Digital Library and Archives, along … Continue reading →

Posted in Geotechnical Engineering, Newton | Tagged , | Leave a comment

XNumbers and Tropical Events

Posted on 10/03/2011 by dougaj4

My on-line friend Al Vachris recently sent me a link to the Tropical Events site, which features a detailed analysis of the orbital motion of the Earth and the other bodies of the solar system, all done in Excel, and … Continue reading →

Posted in Excel, Maths, Newton, Numerical integration | Tagged , , , | 16 Comments

Double Exponential Quadrature

Posted on 07/03/2011 by dougaj4

Graeme Dennes has updated his Tanh-Sinh Quadrature spreadsheet to include Double Exponential Quadrature.  His brief notes are given below, and more details and links to background information are included in the download file. ================================================================= Double Exponential Quadrature UDFs added to Tanh-Sinh Quadrature … Continue reading →

Posted in Excel, Maths, Newton, Numerical integration, UDFs, VBA | Tagged , , , , , | 1 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