Category Archives: Arrays

Moving averages and User Defined Array Functions

Posted on 25/04/2009 by dougaj4

I have recently needed to work with moving averages on a large-ish data set (about 10,000 rows x 10 columns), and for reasons that I will describe in the next post, decided that a User Defined Function (UDF) would be … Continue reading →

Posted in Arrays, Excel, UDFs, VBA | Tagged , , , , | 8 Comments

More on Worksheetfunction vs UDF

Posted on 22/04/2009 by dougaj4

A recent post at Roy Maclean’s VBA Blog suggested that the difference between using a worksheetfunction call in VBA and writing a User Defined Function (UDF) to do the same job was not enough to be worth worrying about.  He tested … Continue reading →

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A Sort Function

Posted on 23/03/2009 by dougaj4

There is often a need to sort data within a VBA routine, but VBA does not have a built in sort function, so I recently had a look for what is on offer on the Internet. Chip Pearson has an … Continue reading →

Posted in Arrays, Excel, UDFs, VBA | Tagged , , , | 21 Comments

Repeating a set of data

Posted on 21/01/2009 by dougaj4

The Microsoft Excel Blog has a discussion on ways of repeating a set of data, for instance making three copies of every row of a range of data.  I have written a simple UDF to do this job, and also extract … Continue reading →

Posted in Arrays, Excel, UDFs, VBA | 1 Comment

Solving simultaneous equations – Fortran dll

Posted on 20/12/2008 by dougaj4

The file simultaneous.zip has been modified to allow access to a Fortran simultaneous equation routine, compiled as a dll.  The original file was posted in solving simultaneous equations.  The advantages of a compiled routine include: Much better performance Greater precision through … Continue reading →

Posted in Arrays, Fortran, Link to dll, Maths, UDFs, VBA | Tagged , , , , , | 3 Comments