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LU Decomposition with Python and Scipy
This post was prompted by a question at the Eng-Tips forum: LU Decomposition which asked why Mathcad was generating LU matrices different to those calculated from the basic theory. The short answer was that there is more than one way … Continue reading
Posted in Excel, Finite Element Analysis, Link to Python, Maths, Newton, NumPy and SciPy, PyXLL, UDFs
Tagged Excel, linear algebra, LUsolve, Python, PyXLL, SciPy
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py_Numpy update and using Numba
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 Excel, Numba, Numpy, PyXLL, py_Numpy, py_Polyfit, UDFs
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Two views on VBA
First from Microsoft: Microsoft are continuing their quest to make downloading spreadsheets with macros ever more difficult, and now any downloaded spreadsheet has VBA code disabled by default. Unblocking the code (if you know and trust the source of the … Continue reading
Indexing pdf files – update
My Windows search function recently once again stopped indexing pdf files, probably associated with an upgrade to Windows 11. Previously this was fixed by downloading the file PDFFilter64Setup.msi from the Adobe site, but that download no longer works, and there … Continue reading
More long numbers with Python
In A not so easy problem I looked at using Python with Excel (via pyxll) to work with very long integers, using the MPMath package. For high precision calculations involving decimal values MPMath is required, but for simple operations entirely … Continue reading
