Author Archives: dougaj4

“Yields circularity when preceded by its quotation” …

Posted on 15/04/2014 by dougaj4

yields circularity when preceded by its quotation. Today’s post takes us on a little circular tour of the internet, starting with: Grumpy Old Programmer (Mike Woodhouse) who returns from a long holiday from blogging to publish a nice little routine … Continue reading →

Posted in Computing - general, Drawing, Newton | Tagged , , , , , | Leave a comment

Extracting numbers with regular expressions

Posted on 12/04/2014 by dougaj4

Shortly after I wrote about extracting numbers from text strings, Winston Snyder at dataprose.org wrote a detailed article about using “regular expressions” to separate text from numbers in any string.  I have adapted his routine for the same purpose as … Continue reading →

Posted in Excel, UDFs, VBA | Tagged , , , , | 19 Comments

Dynamic sorting with Excel, VBA, and Python

Posted on 31/03/2014 by dougaj4

A spreadsheet with User Defined Functions (UDFs) to dynamically sort a range of data has previously been presented here and here. I have now modified the Python version of the UDF for improved functionality, added a second Python function, and … Continue reading →

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

Salthouse

Posted on 26/03/2014 by dougaj4

To show a bit of Southern Hemisphere solidarity with Jeff Weir (who has been getting a bit of flack for having the temerity to discuss non-Excel matters on an Excel blog), I’m bringing forward my next Bach instalment. This post … Continue reading →

Posted in Bach | Tagged , | 1 Comment

Transfer of arrays to/from Python with Pyxll – Part 2; Speed

Posted on 22/03/2014 by dougaj4

Following the previous post, which looked at the way different data types worked when transferring data between Excel and Python, this post looks at ways t0 get the best performance. As a benchmark I have used a short routine that: … Continue reading →

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