Category Archives: Arrays

More Numpy with Excel and xlwings

The spreadsheet presented in the last post on sorting also includes links to many other Numpy functions.  The spreadsheet and associated Python file can be downloaded from: xlNumpy.zip The Numpy functions require xlwings and Numpy to be installed, which are included in … Continue reading

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

Sorting with Python and Numpy

Following the previous post, lets look at sorting functions in the Numpy library. The spreadsheet xlwNumpy links to a variety of Numpy functions, including the sorting functions described below.  The spreadsheet and associated Python code can be downloaded from: xlNumpy.zip … Continue reading

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

Sorting with VBA and Python

This subject was last covered in March 2014.  I have now updated the Python code to work with xlwings, and the new version (including open source VBA and Python code) can be downloaded from: Sortfunc.zip. The previous version, linking to … Continue reading

Posted in Arrays, Excel, Link to Python, UDFs, VBA, xlwings | Tagged , , , , , | 1 Comment

Plotting Charts With Gaps …

“How do you get VB6 to initialize doubles with +infinity, -infinity and NaN”… and various sorts of Not a Number. Back in 2012 (When is an xy chart not an xy chart) I concluded that it was not possible to … Continue reading

Posted in Arrays, Charts, Charts, Excel, UDFs, VBA | Tagged , , , | 5 Comments

Cubic splines with jagged data

A cubic spline provides a good approximation to a smooth curve, and alternative versions are available for free download (see Daily Download 22: Splines and Curves, Update to AL-Spline-Matrix, and xlwSciPy 1.09 – update for xlwings 0.10 and Scipy 0.18.1), but if … Continue reading

Posted in Arrays, Beam Bending, Concrete, Curve fitting, Excel, Newton, UDFs, VBA | Tagged , , , , , , | 2 Comments

Brent’s Method; Update and Examples

Has the free software at this site saved you time and/or money? If so, please contribute to the Raw Impact charity group providing practical help to poor communities in Cambodia: Everydayhero – Cambodia 2018 All contributions gratefully accepted. Contributions are … Continue reading

Posted in Arrays, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , | 1 Comment

Tables and VBA

I don’t use Excel Tables much, and not at all from VBA (where they are known as ListObjects), but that should probably change, so here are four links with comprehensive help on using Tables from VBA: The Spreadsheet Guru- VBA … Continue reading

Posted in Arrays, Excel, VBA | Tagged , , , , | 5 Comments