Tag Archives: UDFs

Transferring different data types to/from Python with pyxll

Posted on 12/05/2026 by dougaj4

When a user defined function (UDF) is created in Excel with Python and pyxll the data type of each argument can be specified, either in the @xl_func decorator, or with a separate @xl_arg decorator for each argument. I prefer the … Continue reading →

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

py_xlCBA update

Posted on 18/01/2026 by dougaj4

Following the previous post the py_xlCBA spreadsheet and associated code have been updated. The updated files, including open-source code, can be downloaded from: py_xlCBA.zip Note that the link in the previous post was downloading the wrong file, and has just … Continue reading →

Posted in Beam Bending, Excel, Finite Element Analysis, Frame Analysis, Link to Python, Newton, PyXLL, Strand7, UDFs | Tagged , , , , , , , , , , | 1 Comment

Calling PyCBA from Excel

Posted on 04/01/2026 by dougaj4

PyCBA is a Python based continuous beam analysis program. From the on-line docs: I have set up a spreadsheet based on py_Conbeam that converts the py_Conbeam input to PyCBA format, then runs the PyCBA analysis and returns the results to … Continue reading →

Posted in Beam Bending, Excel, Frame Analysis, Link to Python, Newton, NumPy and SciPy, PyXLL, Strand7, UDFs | Tagged , , , , , , , , , | 1 Comment

py_ConBeamU and Strand7 check updates-2

Posted on 30/12/2025 by dougaj4

Recent work with the py_ConBeamU spreadsheet found that it was returning incorrect results when the last support had a rotation spring restraint. In spite of the checks against Strand7 having 90 different support conditions, none of them included this one, … Continue reading →

Posted in Beam Bending, Excel, Link to Python, Newton, PyXLL, Strand7, UDFs | 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