Category Archives: VBA

VBA polynomial functions update

Posted on 29/06/2026 by dougaj4

Following several comments at an old post I have made updates to the Polynomial spreadsheet. The new files can be downloaded from: Polynomial.zip The changes are: SolvePoly was amended to accept numbers or signed cell addresses in the input. QuarticR, … Continue reading →

Posted in Excel, Link to Python, Maths, Newton, NumPy and SciPy, PyXLL, UDFs, VBA | Tagged , , , , , , , | Leave a comment

Dynamic array update and the @ operator

Posted on 11/06/2026 by dougaj4

Many of the user defined functions (UDF’s) presented in this blog return an array rather than a single value. Options for displaying arrays in Excel have changed significantly in recent years and this post looks at the most efficient ways … Continue reading →

Posted in Arrays, Excel, Link to Python, PyXLL, UDFs, VBA | Tagged , , , , , , , , | 1 Comment

The Ultimate Python Guide for VBA Developers

Posted on 15/04/2026 by dougaj4

I recently discovered “The Ultimate Python Guide for VBA Developers” which is a free book available from the pyxll site at https://www.pyxll.com/learn-python.html. The pyxll site says: This book has been written specifically for VBA and Excel users like you. Fast … Continue reading →

Posted in Computing - general, Excel, Link to Python, Python Pandas, PyXLL, UDFs, VBA | Tagged , , | Leave a comment

Alternative iterative solvers

Posted on 03/03/2026 by dougaj4

This post looks at alternative solutions to a problem posted on Quora: How can 2^x = 10x be solved? One of the alternatives requires a new function linking to Scipy that has been added to the pyScipy module, that can be downloaded … Continue reading →

Posted in Excel, Link to Python, Maths, Newton, NumPy and SciPy, PyXLL, UDFs, VBA | Tagged , , , , , , , , | Leave a comment

Continuous beam animations with VBA and Python

Posted on 20/12/2025 by dougaj4

Following a lengthy discussion at Eng-Tips I have developed several functions to generate animations of the effects of applied moving loads. The Python code and examples have been added to the py_ConBeamU.zip file which can be downloaded from: py_ConBeamU.zip Starting … Continue reading →

Posted in Animation, Beam Bending, Charts, Excel, Frame Analysis, Link to Python, Newton, PyXLL, UDFs, VBA | Tagged , , , , , , , , , , | 1 Comment