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Author Archives: dougaj4
Dots and Crosses
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 cross product, dot product, Excel, UDF, VBA, vector area, vectors
11 Comments
Section Properties from Coordinates Without VBA
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 Area, Centroid, Excel, section properties, UDF, VBA
13 Comments
Wonders of the Universe – Kate Rusby
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
Starting Javascript
Since this is not (just) an Excel blog, I’ll be looking at applications of the Google Docs spreadsheet. One of the attractions of the Google spreadsheet alternative is that it is linked to a scripting language, so I should be … Continue reading
Importing selected rows from a text file
I was recently asked if the routine in the Text-in2 spreadsheet to import and split data from text files could be modified to only import rows that met specified criteria. A similar end result can be achieved by importing the whole … Continue reading
Newton Excel Bach, not (just) an Excel Blog 