Tag Archives: VBA

mpmath for Excel

Posted on January 13, 2019 by

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 , , , , , , , , | Leave a comment

Transferring large arrays with Pyxll

Posted on January 5, 2019 by

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 updates to ArcSpline and IP2

Posted on December 27, 2018 by

I have uploaded version 2.18 of the IP2 spreadsheet to: IP2.zip The new version includes updates to the IP, IP_4, and ArcSpline functions, as described below.  The download is free and includes full open-source code. The IP and IP_4 functions find … Continue reading →

Posted in Arrays, Coordinate Geometry, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , , | Leave a comment

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

Numerical Integration; Tanh-Sinh Quadrature v. 4.4

Posted on November 23, 2018 by

Update 27 Nov 2018: Version 4.41 now available from the link below, with minor modifications for compatibility with Excel 2007. I recently received a new version (4.4) of the numerical integration spreadsheet by Graeme Dennes which is now available for … Continue reading →

Posted in Charts, Excel, Maths, Newton, Numerical integration, UDFs, VBA | Tagged , , , , , , , , | 9 Comments

AS 3600 and RC Design Functions 8.01

Posted on November 13, 2018 by

The updated RC Design Functions spreadsheet (presented here) included an updated UMom function to find the ultimate strength of a rectangular section under combined bending and axial load; but I omitted to include the revisions to the alpha2 and Gamma … Continue reading →

Posted in Beam Bending, Concrete, Excel, Newton, UDFs, VBA | Tagged , , , , , , | Leave a comment

More iterative solvers

Posted on October 28, 2018 by

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