Author Archives: dougaj4

Plotting Mandelbrot

There are many sites discussing the Mandelbrot Set, but not many examples using VBA to plot the set in Excel, so here is my effort: The spreadsheet (including open source VBA code) may be downloaded from: Mandelbrot chart.zip Note that … Continue reading

Posted in Charts, Charts, Coordinate Geometry, Drawing, Excel, Maths, Newton, VBA | Tagged , , , | 3 Comments

Using conditional formatting with array formulas

A recent Quora question asked “How do I highlight the number closest to an initial number in a row in Excel?“.  The answer by Bill Jelen provides a good example of using conditional formatting with an array formula: In my … Continue reading

Posted in Arrays, Excel | Tagged , , , | Leave a comment

64 bit Excel and the Strand7 API

Back in May 2017 I posted a sample spreadsheet using the Strand7 API to allow Excel to read and write Strand7 node data and results.  A comment noted at the time that the spreadsheet was not working with 64 bit … Continue reading

Posted in Excel, Finite Element Analysis, Frame Analysis, Link to dll, Newton, Strand7 | Tagged , | Leave a comment

64 bit Excel and PtrSafe

Installing my Office 365 subscription on a new computer I discovered it had decided (without asking) to upgrade itself to the 64 bit version, which resulted in some of my spreadsheets not working on the new system.  The main problem … Continue reading

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

Concrete 2019

The Concrete Institute of Australia’s biennial conference is this year being held in Sydney from 8-11 September, and early-bird registration has now been extended to 15th July, so register now and save! For more details of the conference see: Concrete … Continue reading

Posted in Concrete, Newton | Tagged , , , | 2 Comments

Installing Adobe Reader non-DC version.

The option to install a non-DC version of Adobe Reader used to be hidden away under a menu on the DC installation screen.  It seems that Adobe would really, really like you to use the DC version, because the other … Continue reading

Posted in Computing - general | Tagged , , | Leave a comment

Solving the Lagrangian Point equation for the Moon

This post was prompted by a recent question at Fitting high order polynomials, asking for Excel methods to solve the equations for the radius of the Moon’s Lagrangian Point 1. All the methods described in this post have been added to … Continue reading

Posted in Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , | 3 Comments