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# Author Archives: dougaj4

## Iterative solvers and arrays

A recent thread at Eng-Tips was looking for a solution to the problem described below: The solutions to this problem described below can be downloaded from: ItSolve.zip and xlScipy3.zip The ItSolve.xlsb spreadsheet contains a user defined function (UDF) to solve iterative … Continue reading

## Australian Greenhouse Gas Emissions

What the Australian Government says: PM claims Australia will meet Paris target ‘in a canter’ despite emissions climbing. Morrison says rate of increase not as high as previous years and renewables investment will ensure Australia meets commitment pm-claims-australia-will-meet-paris-target-in-a-canter-despite-emissions-climbing What the … Continue reading

## Time in hours and minutes between two dates

Dates and times in Excel are stored as a date number, which is the number of days since 1 January 1900, with the value after the decimal point representing the time of day. To calculate the number of hours between … Continue reading

Posted in Excel
Tagged Excel, format times, greater than 24 hours, Text function, time difference
4 Comments

## New AS 3600 and RC Design Functions 8

A revised version of the Australian Concrete Structures code, AS 3600, was recently published, with many significant changes, including: Changes to ULS reduction Factors Creep and shrinkage Curvature and deflection calculations Crack width calculation and stress limits Major changes to … Continue reading

## 2 more Moves Through the Fair

I have just mended a broken link in the previous installment of “She moves Through the Fair”. Here are two more, from Tir Eolas: and Tara McNeill:

## Arc-spline update

The input for the first version of the Arcspline function required the coordinates of the centre of each arc, as well as the angle of the tangents at each end of the arc. I have now added a new version with … Continue reading

Posted in Coordinate Geometry, Excel, Maths, Newton, UDFs, VBA
Tagged Arc-spline function, Excel, IP2.xlsb, UDFs, VBA
7 Comments

## Using Redim and 3DFrame

I recently received a query about the 3DFrame spreadsheet failing to run. The problem was that the code was trying to Redim an array that had not been previously created with a Dim statement. This does not cause a problem … Continue reading