Tag Archives: Numba

py_Numpy update and using Numba

Posted on 11/05/2023 by dougaj4

The py_Numpy spreadsheet presented at Calling Numpy polynomial functions from Excel has had a minor upgrade to the py_Polyfit function, which was previously returning an error message if the optional “full” argument was set to False. The new version can be … Continue reading →

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

Solving cubic equations – background and timing

Posted on 25/10/2022 by dougaj4

For more information on the polynomial functions, including quartic and higher order solvers, see: Solving Quadratic, Cubic, Quartic and higher order equations; examples Re-reading the Wikipedia article on solving cubic equations, I noticed that the trigonometrical solution for finding 3 real … Continue reading →

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

Installing Python and pyxll from scratch

Posted on 26/09/2022 by dougaj4

Updated 28th September 2022. Matplotlib latest version OK. I recently installed Python and pyxll (plus the required additional libraries) on a new computer, which raised a few problems with incompatible versions, so here is a summary of what worked (as … Continue reading →

Posted in Animation, Arrays, Charts, Coordinate Geometry, Differential Equations, Excel, Finite Element Analysis, Link to Python, Maths, Newton, Numerical integration, NumPy and SciPy, Python Pandas, PyXLL, UDFs | Tagged , , , , , , , , , , , , , , | 2 Comments

Python functools – cache and lru_cache

Posted on 01/04/2022 by dougaj4

Update 3rd April 2022: Following the comment from Larry Schuster I have modified the code so that the factorial0 function actually uses cache as intended, rather than lru_cache. I also added code to clear the cache after each timer run, … Continue reading →

Posted in Excel, Link to Python, PyXLL, UDFs | Tagged , , , , , , , | 3 Comments

Computing and plotting the Mandelbrot set in Excel …

Posted on 07/12/2021 by dougaj4

… with Python, Numba and pyxll. As promised in the previous post, this post will look at alternative procedures for calculating and plotting the Mandelbrot set with Python based code. The spreadsheet presented here and the associated Python code may … Continue reading →

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