Category Archives: Link to Python

mpmath for Excel

Posted on 13/01/2019 by dougaj4

mpmath has been mentioned in passing here before, but not in any detail.  The mpmath site says: mpmath is a free (BSD licensed) Python library for real and complex floating-point arithmetic with arbitrary precision. It has been developed by Fredrik … Continue reading →

Posted in Excel, Link to Python, Maths, PyXLL, UDFs, VBA, xlwings | Tagged , , , , , , , , | 7 Comments

Transferring large arrays with Pyxll

Posted on 05/01/2019 by dougaj4

Pyxll is a commercial Excel add-in linking Excel and Python.  The latest version  offers greatly improved performance in transferring data between Excel and Python as Numpy arrays, amongst many other new features and improvements. To check what this means in practice, … Continue reading →

Posted in Arrays, Excel, Frame Analysis, Link to Python, PyXLL, UDFs, VBA | Tagged , , , , , , | Leave a comment

More SciPy Solvers

Posted on 19/12/2018 by dougaj4

The xlwings Scipy spreadsheet has been updated with a new example of the xl_SolveF function, that uses the Scipy Optimize root function.  The new spreadsheet can be downloaded from: xlScipy3.zip The new example uses a python function ic_calc (included in the … Continue reading →

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

Python Problems

Posted on 29/11/2018 by dougaj4

I have recently returned to using Pyxll to link Excel to Python (of which more later), which required the installation of a 32 bit version of Python 3.7.  First trials after installation returned the message: “AttributeError: ‘module’ object has no … Continue reading →

Posted in Computing - general, Link to Python, NumPy and SciPy | Tagged , , , | Leave a comment

More iterative solvers

Posted on 28/10/2018 by dougaj4

Following the recent post on using Brent’s Method solvers on an array (Iterative solvers and arrays), here is another example with an engineering related problem.  The example is included in the xlScipy3 spreadsheet, which can be downloaded from: xlScipy3.zip The depth … Continue reading →

Posted in Arrays, Beam Bending, Concrete, Excel, Link to Python, Maths, Newton, NumPy and SciPy, UDFs, VBA, xlwings | Tagged , , , , , , , , | Leave a comment