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# Category Archives: Excel

## Scipy linear algebra functions in Excel

The file pyLinAlgfuncs3.zip has open source Python code allowing the Scipy linear algebra functions to be called from Excel using the pyxll add-in. It also includes all the Python code to perform LU decomposition, as discussed in the previous post., … Continue reading

Posted in Arrays, Excel, Finite Element Analysis, Frame Analysis, Link to Python, Maths, Newton, NumPy and SciPy, PyXLL, UDFs
Tagged Excel, Liear algebra functions, Link to Python, PyPardiso, PyXLL, Scipy Linalg, UDFs
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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

## 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