Category Archives: UDFs

On long and short formulas and VBA

Posted on 17/07/2021 by dougaj4

A recent thread at Eng-Tips asked the following apparently simple question: Starting with a string consisting of numbers with a single central group of letters, how can this string be truncated at the end of the letters, so that for … Continue reading →

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

ULS Design Functions 2.13

Posted on 11/07/2021 by dougaj4

Update 17 May 2022: Following discussion on 10-11 May 22 the download file has been updated to version 2.15, fixing problems with the interaction diagram with a rectangular stress block under high axial loads. I have uploaded another update to … Continue reading →

Posted in Concrete, Excel, Newton, UDFs, VBA | Tagged , , , , , , , , | 25 Comments

Using Numba with Excel and pyxll …

Posted on 30/05/2021 by dougaj4

… and a Numpy trap. I last looked at using the just-in-time compiler Numba with Python some time ago (Two Timers), but I was prompted to take another look by an article in Medium that claimed Python Can Be Faster … Continue reading →

Posted in Arrays, Excel, Link to Python, NumPy and SciPy, PyXLL, UDFs, VBA | Tagged , , , , , , , | 2 Comments

ULS Design Functions update

Posted on 23/05/2021 by dougaj4

The ULS Design Functions spreadsheet has been updated with further changes related to the new Australian Standard for concrete structures; AS 3600-2018, and with some other fixes.  The new version can be downloaded from: ULS Design Functions.zip The changes in … Continue reading →

Posted in Beam Bending, Concrete, Excel, Newton, UDFs, VBA | Tagged , , , , , , , | 13 Comments

3D Frame Update

Posted on 29/04/2021 by dougaj4

Following a comment here I have updated the code for the 3DFrame spreadsheet to calculate shear deflections correctly for sections with a different shear area for each transverse principal axis. The updated files can be downloaded from: 3DFrame.zip A note … Continue reading →

Posted in Excel, Frame Analysis, Newton, Strand7, UDFs, VBA | Tagged , , , , , | 2 Comments