Category Archives: NumPy and SciPy

Using Excel with Python and ctypes

Posted on October 5, 2020 by

The Strand7 API provides an interface between the Strand7 Finite Element Analysis program and external software. It works with many different languages, including Python, which uses ctypes to transfer data to and from the API functions. It is essential that … Continue reading →

Posted in Beam Bending, Excel, Link to dll, Link to Python, NumPy and SciPy, PyXLL, Strand7, UDFs | Tagged , , , , , | Leave a comment

More Python Traps

Posted on March 30, 2020 by

I recently posted on some Python Traps, focussing on code where changes in the values of sub-routine arguments were not reflected in the calling routines.  The reverse can also be a problem: if an array, a, is passed to a … Continue reading →

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

Python Traps

Posted on January 1, 2020 by

When converting existing VBA code to Python there are a number of obvious changes to the syntax that need to be made for the code to run at all, but there are also a number of not so obvious traps … Continue reading →

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

Multiple Integration with Scipy

Posted on January 31, 2019 by

Scipy has 3 functions for multiple numerical integration in the scipy.integrate module: dblquad: Compute a double integral. tplquad: Compute a triple integral’ nquad: Integration over multiple variables. I have written six functions to call these functions from Excel, via Pyxll: Each … Continue reading →

Posted in Excel, Link to Python, Maths, Newton, Numerical integration, NumPy and SciPy, PyXLL, UDFs | Tagged , , , , , | 6 Comments

More SciPy Solvers

Posted on December 19, 2018 by

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