Category Archives: Link to Python

Transfer of arrays to/from Python with Pyxll – Part1; Data Types

Posted on 16/03/2014 by dougaj4

This post will look at options for transferring arrays between Excel and Python using Pyxll, including data types, and problems associated with transferring mixed data types.  In the following post I will look at the relative performance of the various … Continue reading →

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

Global to Local for plates (and three node beams)

Posted on 02/03/2014 by dougaj4

The Glob_to_Loc function (see Converting from global to local coordinates (and vice versa) ) converts forces and deflections of a beam from the global coordinate system to the local system, defined by the longitudinal axis of the beam and a rotation angle … Continue reading →

Posted in Coordinate Geometry, Excel, Finite Element Analysis, Frame Analysis, Link to Python, Maths, Newton, Strand7, UDFs, VBA | Tagged , , , , , , , | 3 Comments

The angle between two vectors, Python version

Posted on 01/03/2014 by dougaj4

I posted a VBA function to return The angle between two vectors, in 2D or 3D last year, and have just discovered that Python and Numpy are lacking this function.  Since all the suggested code I found in a quick search used: Cos θ … Continue reading →

Posted in Coordinate Geometry, Excel, Link to Python, Maths, Newton, NumPy and SciPy | Tagged , , , | 10 Comments

New Links: Scientific Python and Engineering Excel

Posted on 31/01/2014 by dougaj4

The previous post had a link to Cyrille Rossant which is worth a closer look.  The blog has many detailed posts on scientific applications of Python, as well as links to Galry: a high performance interactive visualization package in Python and his … Continue reading →

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

The speed of loops in Python

Posted on 24/01/2014 by dougaj4

This post is based on exercises published by Cyrille Rossant in his book “Learning IPython for Interactive Computing and Data Visualization”.  Cyril also has a blog well worth looking at: http://cyrille.rossant.net/blog/ (Thanks to Alfred Vachris and Boris Vishnevsky for the links). … Continue reading →

Posted in Arrays, Link to Python, NumPy and SciPy | Tagged , , , , | Leave a comment