Author Archives: dougaj4

New Links, and an Update

Posted on 29/08/2011 by dougaj4

Some new links, mostly suggested by Al Vachris: Jan Karel Pieterse has been freely providing some of the best Excel advice on the Internet for some years now, but he has escaped inclusion on my blogroll, possibly because his site … Continue reading →

Posted in Computing - general, Excel, Javascript | Tagged | 4 Comments

Area from Vectors

Posted on 27/08/2011 by dougaj4

The previous post looked at User Defined Functions (UDFs) for working with vectors, including examples of functions to find the area of polygons defined by coordinates.  In this post the functions will be extended to find other section properties (such … Continue reading →

Posted in Arrays, Coordinate Geometry, Excel, Maths, UDFs, VBA | Tagged , , , , , , | 5 Comments

Dots and Crosses

Posted on 21/08/2011 by dougaj4

The comments from Bill Harvey in the previous post prompted me to have a closer look at the functions available in Excel for working with vectors.  Here is a complete list of them: =SUMPRODUCT() (Equivalent to the vector dot product) This … Continue reading →

Posted in Arrays, Coordinate Geometry, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , | 11 Comments

Section Properties from Coordinates Without VBA

Posted on 07/08/2011 by dougaj4

At the Eng-Tips forum there was a question asking for a calculation of area and centroid values from coordinates without the use of VBA.  In my opinion using VBA is much the easiest and most robust way to do it, … Continue reading →

Posted in Coordinate Geometry, Excel, Newton, UDFs, VBA | Tagged , , , , , | 13 Comments

Wonders of the Universe – Kate Rusby

Posted on 02/08/2011 by dougaj4

At the end of the Brian Cox “Wonders of the Universe” session on gravity the closing sequence is accompanied by a haunting folk song that I was not familiar with. A quick search found that it was the appropriate “Falling” … Continue reading →

Posted in Bach | Tagged , , | 5 Comments