Tag Archives: sparse matrices

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 Functions with Excel and pyxll 7 – Linear Algebra

Posted on 01/01/2024 by dougaj4

This post looks at linking Excel to the Scipy linear algebra functions using pyxll, and also using the PyPardiso solver. Previous posts on this topic include: The pyLinAlgfuncs3 spreadsheet, with associated Python code in pyLinalgfuncs3.py and pyScipy3.py, are included in the … Continue reading →

Posted in Arrays, Excel, Finite Element Analysis, Frame Analysis, Link to Python, Maths, Newton, NumPy and SciPy, PyXLL, UDFs | Tagged , , , , , , , , , , , | 1 Comment

Installing PyPardiso and speed of Scipy spsolve

Posted on 12/06/2022 by dougaj4

I recently upgraded to Python 3.10, and because of some problems with my previous installation I decided to do a complete new installation using pip, which required installation of all the libraries needed for my various programs. For my linear … Continue reading →

Posted in Excel, Finite Element Analysis, Frame Analysis, Link to Python, Newton, NumPy and SciPy, PyXLL, UDFs | Tagged , , , , , , | 4 Comments

Making Finite Element Analysis go faster – Update and PyPardiso

Posted on 17/10/2021 by dougaj4

The previous post on this topic looked at the performance of alternative Scipy sparse equation solvers. This post updates those results with the current Scipy version (1.7.1), with very different results. It also compares the Scipy solver performance with the … Continue reading →

Posted in Arrays, Excel, Finite Element Analysis, Frame Analysis, Link to Python, Newton, NumPy and SciPy, PyXLL | Tagged , , , , , , | 5 Comments

Making Finite Element Analysis go faster …

Posted on 27/06/2021 by dougaj4

… with Numba and Scipy sparse matrix functions. As promised in the previous post in this series, I will be looking at speeding up the formation and solving of matrix functions for the analysis of structural frames, using Excel and … Continue reading →

Posted in Arrays, Excel, Finite Element Analysis, Frame Analysis, Link to Python, NumPy and SciPy, PyXLL | Tagged , , , , , , , , | 4 Comments