Category Archives: Arrays

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

SplineBeam update

Posted on 20/06/2010 by dougaj4

Previous SplineBeam post I have modified the SplineBeam spreadsheet to allow input of a single span (simply supported or with end constraints), and to optionally allow input of the position of intermediate nodes, rather than dividing each span into equal segment lengths.  This … Continue reading →

Posted in Arrays, Beam Bending, Excel, Frame Analysis, Newton, UDFs, VBA | Tagged , , , , | 1 Comment

Compiled AlgLib Matrix Functions for Excel

Posted on 27/05/2010 by dougaj4

This post describes a series of matrix functions compiled from the AlgLib library code (covered in previous posts) as a dll that can be called from Excel VBA, and used as User Defined Functions (UDFs).  A spreadsheet containing the necessary VBA … Continue reading →

Posted in Arrays, Excel, Link to dll, Maths, Newton, UDFs, VBA | Tagged , , , , , , | 18 Comments