Category Archives: Maths

Random numbers, palindromes and Numpy update

Posted on 09/06/2025 by dougaj4

This post looks at some of the options for generating random numbers in Excel and Python. The code and example spreadsheets can be downloaded from: Updated Numpy files at: py_SciPy.zipCode added to the Pandigital files at: Pandigitals.zip The py_SciPy download … Continue reading →

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

Scipy Linalg functions stopped working

Posted on 27/10/2024 by dougaj4

I recently noticed that the iterative linear algebra solvers in my pyLinAlgfuncs3.xlsb spreadsheet had stopped working. It turned out that the optional tolerance argument had been renamed ‘rtol’. Changing all the occurrences of the name in the Python code fixed … Continue reading →

Posted in Excel, Finite Element Analysis, Frame Analysis, Link to Python, Maths, Newton, NumPy and SciPy, PyXLL, UDFs | Tagged , , , , , , , , , , , | Leave a comment

Scipy-statistics update

Posted on 08/09/2024 by dougaj4

Links to the Scipy statistics functions were last presented here. The functions have since had extensive updates: The py_Stats spreadsheet, with associated Python code in PythonStatsFuncs3.py and pyScipy3.py, are included in the download file: py_SciPy.zip Details of the required pyxll … Continue reading →

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

Let, Lambda, and py_Eval

Posted on 21/04/2024 by dougaj4

I have covered the new Excel Let and Lambda functions before at: Two New Functions; Let and Lambda Eval and Let examples Lambda and VBA The Lambda function is now available to all Microsoft 365 subscribers, so I have now looked at … Continue reading →

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

Extracting and counting factors with Python and Numba

Posted on 24/02/2024 by dougaj4

This post features code using the pyxll add-in to call Python code from Excel. See pyxll for more details and downlod. A recent issue of New Scientist had a series of puzzles finishing with: how many integers between 1 and … Continue reading →

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