Author Archives: dougaj4

Two Timers

Posted on 06/06/2014 by dougaj4

The simplest way to check the execution time of VBA code is with the built in Timer function, but this returns a single precision value in seconds, resulting in a minimum time step of about 10 milliseconds.  For VBA code … Continue reading →

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

Feet and inches, and other units

Posted on 31/05/2014 by dougaj4

Following a query at Eng-tips I have had a look at options in Excel for converting metres to feet and inches, with the inches displayed as a fraction rather than a decimal. Converting from metres to feet or inches is … Continue reading →

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

Python Matrix Functions with ExcelPython – 2

Posted on 28/05/2014 by dougaj4

Following the previous ExcelPython post I have modified the VBA and Python code for improved performance and to simplify the Python coding.  The main change is that where Numpy Arrays are required in the Python code, these are now created … Continue reading →

Posted in Arrays, Excel, Link to Python, Maths, NumPy and SciPy, UDFs, VBA | Tagged , , , , , , | 14 Comments

Planxty and Little Musgrave

Posted on 26/05/2014 by dougaj4

  Planxty are one of my favourite groups form the early 70’s, consisting of  Christy Moore (vocals, acoustic guitar, bodhrán), Andy Irvine (vocals, mandolin, mandola, bouzouki, hurdy-gurdy, harmonica), Dónal Lunny (bouzouki, guitars), and Liam O’Flynn (uilleann pipes, tin whistle), all … Continue reading →

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Linking to Python with Excel-Python, and Python matrix functions

Posted on 22/05/2014 by dougaj4

I have been experimenting for a few weeks with a new package linking Excel to Python, by the name of ExcelPython.  Here is what the author says about it: “ExcelPython is a lightweight, easily distributable library for interfacing Excel and … Continue reading →

Posted in Arrays, Excel, Finite Element Analysis, Frame Analysis, Link to Python, Maths, Newton, NumPy and SciPy, UDFs, VBA | Tagged , , , , , , , , | 5 Comments