Category Archives: Excel

Python for VBA users – 1

Posted on 24/09/2013 by dougaj4

Following my recent posts on some preliminary experimentation with linking Excel to Python, this will be the first of a more structured series, mainly as a reminder to myself of lessons learnt on the way, but also I hope of … Continue reading →

Posted in Excel, Link to Python, UDFs, VBA | Tagged , , , , , | 2 Comments

Sorting with Python

Posted on 19/09/2013 by dougaj4

A previous post provided a VBA Sort function that could be used as a User Defined Function (UDF) to provide a sorted list on the spreadsheet, or called from another VBA routine to sort an array. I have just written a … Continue reading →

Posted in Arrays, Excel, Link to Python, UDFs | Tagged , , , , , | 5 Comments

Python matrix functions in Excel, using Pyxll

Posted on 10/09/2013 by dougaj4

Following my previous Python post I have now successfully created a number of matrix arithmetic User Defined Functions (UDFs), using Python, SciPy and the PyXll add-in: The spreadsheet and associated Python modules may be downloaded from Matrixpyxll.zip See the previous post … Continue reading →

Posted in Excel | 2 Comments

Installing Python, Scipy and Pyxll

Posted on 09/09/2013 by dougaj4

I have recently been experimenting with Pyxll, which after a few initial hiccoughs is proving to be an easy and efficient way to connect Excel to Python based scientific and maths applications, such as linear algebra routines and ODE solvers.  … Continue reading →

Posted in Excel, Link to dll, Link to Python | Tagged , , , , | 15 Comments

Arrays vs Collections vs Dictionary Objects (and Dictionary help)

Posted on 29/08/2013 by dougaj4

A recent comment by Lori Miller at Daily Dose of Excel suggested that (for the particular application being discussed) the VBA Collection object was quicker than using scripting dictionaries.  Since I hardly ever use collections (other than the built-in ones), and … Continue reading →

Posted in Arrays, Excel, VBA | Tagged , , , , | 7 Comments