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# Category Archives: VBA

## 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

## 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

## 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

## Using VBA Evaluate as an Array Function

I recently discovered from a thread at Chandoo’s Excel Forum that the VBA Evaluate function can be used as an array function. As a simple example: Range(“A11:A16”).Value = Evaluate(“= B11:B16 + C11:C16”) will add the values in columns B and C, … Continue reading

Posted in Arrays, Coordinate Geometry, Excel, Maths, UDFs, VBA
Tagged array functions, Evaluate, Excel, UDFs, VBA
2 Comments

## Arcs and arc-splines

I have added two user defined functions (UDFs) to the IP2 spreadsheet to generate coordinates for a single arc, or a series of arcs connected (if necessary) by straight lines. The new version may be downloaded from: IP2.zip As an example … Continue reading

## New Tricks …

… or in some cases, old but forgotten tricks. The first comes from a Quora question, asking for the most underutilised feature in Excel. When de-bugging a VBA routine you can set a break point where the code will stop: … Continue reading