Category Archives: Excel

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

Plotting Ferns

Posted on 27/09/2010 by dougaj4

Over at Daily-Dose-of-Excel mrt has posted an interesting VBA version of a Matlab program that used an Iterated Transfer Function to plot a graph resembling a fern.  The original Matlab code came from Dr Tom Wood, and Michael’s VBA version works just fine, … Continue reading →

Posted in Arrays, Charts, Drawing, Excel, Maths, Newton, VBA | Tagged , , , , | 5 Comments

Working with FEM data and using the dictionary object

Posted on 26/09/2010 by dougaj4

This post features an Excel User Defined Function (UDF) to count the number of different element types (beams, plates, bricks and links) and the number of node restraints at each end of listed beams from a finite element model.  The … Continue reading →

Posted in Arrays, Excel, Finite Element Analysis, Newton, UDFs, VBA | Tagged , , , , , | 5 Comments

PyXLL Links

Posted on 20/09/2010 by dougaj4

This is really just a bookmark for me and anyone else who may be interested. “PyXLL is an Excel addin that enables functions written in Python to be called in Excel.” That’s all I know, but it looks interesting, and … Continue reading →

Posted in Computing - general, Excel, Link to dll, UDFs | Tagged , | 1 Comment