Author Archives: dougaj4

Tanh-Sinh Quadrature update

Posted on 20/10/2010 by dougaj4

Graeme Dennes has been continuing work on his Tanh-Sinh Quadrature function, and recently sent me a revised version, which can be downloaded from: Tanh-Sinh.zip The main change is a new automatic tolerance adjustment feature which automatically increases the tolerance for … Continue reading →

Posted in Excel, Maths, Newton, Numerical integration, UDFs, VBA | Tagged , , , , , , , | 9 Comments

Interactive File List

Posted on 20/10/2010 by dougaj4

Microsoft recently introduced the facility to embed a link to a live spreadsheet stored on Windows Skydrive. This is my first attempt to use this facility.  The spreadsheet below is a list of all the files published on this blog, together … Continue reading →

Posted in Excel, UDFs, VBA | Tagged , , | Leave a comment

Update to Beam1 and Beam2

Posted on 16/10/2010 by dougaj4

It has just been pointed out that the single span beam spreadsheet presented at Frame Analysis with Excel 1 does not work for a propped cantilever.  The same applies to the spreadsheet for single span sloping beams at Frame Analysis with … Continue reading →

Posted in Beam Bending, Excel, Frame Analysis, Newton | Tagged , , | 3 Comments

Faster Integration with the Tanh-Sinh Method

Posted on 10/10/2010 by dougaj4

In my previous post about numerical integration I mentioned that I would be writing about another lesser known method providing better speed and/or accuracy in many cases.  The method is known as Tanh-Sinh quadrature, and has been implemented in Excel by a reader … Continue reading →

Posted in Excel, Maths, Numerical integration, UDFs, VBA | Tagged , , , , , , , | 3 Comments

Faster Ferns

Posted on 03/10/2010 by dougaj4

I have modified the fern input parameters in the spreadsheet presented in the previous post to match the layout used by Barnsley and others, so that examples such as those given at the Wikipedia article can be entered directly.  The … Continue reading →

Posted in Arrays, Charts, Charts, Drawing, Excel, Maths, Newton, VBA | Tagged , , , | 4 Comments