Category Archives: PyXLL

Floating Point Precision Problems

Posted on 05/04/2021 by dougaj4

A question on Quora : prompted me to look at how these numbers are handled in Excel, in VBA called from Excel, and in Python called from Excel via pyxll. The results are shown in the screenshot below: Column A … Continue reading →

Posted in Excel, Link to Python, Maths, Newton, NumPy and SciPy, PyXLL, UDFs, VBA | Tagged , , , , , , , | 1 Comment

Python callable arguments from Excel

Posted on 29/01/2021 by dougaj4

Many Scipy functions have “callable” arguments, i.e. functions that can be called, with the returned data used as input by the calling function. Types of callable arguments include: Functions in the active Python module Functions in any active loaded library … Continue reading →

Posted in Excel, Link to Python, NumPy and SciPy, PyXLL, UDFs | Tagged , , , , , , , | 1 Comment

Python optional arguments from Excel – Part 2

Posted on 19/01/2021 by dougaj4

The previous post provided a method for using pyxll to pass optional arguments from Excel to Python whilst preserving the default values of any called Python function for arguments that were omitted in the Excel function. One condition where this … Continue reading →

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

Using Python optional arguments from Excel with pyxll

Posted on 14/01/2021 by dougaj4

Python functions allow optional arguments to be specified by allocating a default value to each optional argument. The pyxll add-in allows Python functions called from Excel to work in the same way, so any argument with a default value may … Continue reading →

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

Using Excel with Python and ctypes

Posted on 05/10/2020 by dougaj4

The Strand7 API provides an interface between the Strand7 Finite Element Analysis program and external software. It works with many different languages, including Python, which uses ctypes to transfer data to and from the API functions. It is essential that … Continue reading →

Posted in Beam Bending, Excel, Link to dll, Link to Python, NumPy and SciPy, PyXLL, Strand7, UDFs | Tagged , , , , , | Leave a comment