Category Archives: NumPy and SciPy

Long integers in Python and Excel and py_Fact

Posted on 27/08/2025 by dougaj4

I have added a new py_Fact function to the py_Scipy module, that returns the factorial of an integer as a float if it is up to 15 digits long, or a string for longer numbers. The revised code, and the … Continue reading →

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

3DFrame-py rel. 0.50

Posted on 14/07/2025 by dougaj4

Following the recent post on the Python lru_cache function (Python functools and the Fibonacci Sequence) I have had a look at using lru_cache in the 3DFrame-py spreadsheet. So far using lru_cache in this code has provided little to no speed improvement, … Continue reading →

Posted in Beam Bending, Coordinate Geometry, Excel, Finite Element Analysis, Frame Analysis, Link to Python, Newton, NumPy and SciPy, PyXLL, Strand7, UDFs | Tagged , , , , , , , | Leave a comment

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

Pandigital sums and Python permutations and combinations

Posted on 13/04/2025 by dougaj4

The New Scientist brain twister from last weeks edition has several problems involving pandigital sums, which are additions that use each of the digits from 0 to 9 exactly once, and with no number within the sum that starts with … Continue reading →

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

Scipy update and Linalgfuncs speed check

Posted on 16/12/2024 by dougaj4

I have updated the Scipy code to remove repeated loading of the Numpy code, and to fix a number of other warnings from the pyxll log file. I have also updated the speed check of the various linear algebra solvers, … Continue reading →

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