Category Archives: UDFs

Section Properties UDF and UDF charting

Posted on 14/03/2008 by dougaj4

The technique for calculating section properties from coordinates is conveniently coded into a UDF: Function Area(xy_range As Variant) As Double Dim XYcells As Variant Dim N As Long, NumX As Long Dim XD As Double, YSum As Double XYcells = … Continue reading →

Posted in Arrays, Charts, Excel, UDFs | Tagged | 6 Comments

Ranges and Arrays – 2

Posted on 05/03/2008 by dougaj4

Yesterday we looked at how to get data from a worksheet range into a VBA array.  Today’s post looks at the opposite operation; writing an array to a worksheet range.  With a UDF it couldn’t be simpler: Function MyFunction() as … Continue reading →

Posted in Arrays, Excel, UDFs | 1 Comment

Ranges and Arrays

Posted on 04/03/2008 by dougaj4

Transferring data from a worksheet into a VBA routine, or the other way round, is one of the most frequent tasks carried out in VBA programming.  Fortunately there is a simple way to do it: In a subroutine: Name the … Continue reading →

Posted in Arrays, Excel, UDFs | Tagged , , , | 4 Comments

Worksheetfunction vs UDF

Posted on 23/02/2008 by dougaj4

The previous post provided VBA code for a number of trigonometric functions, most of which are already available in Excel.  Why bother you may say, why not just use the WorksheetFunction object?  The numbers below provide the answer: Time to … Continue reading →

Posted in Excel, UDFs | Tagged | 7 Comments

Trigonometric Functions in VBA

Posted on 23/02/2008 by dougaj4

Deep within the bowels of the Microsoft on-line help can be found: http://msdn2.microsoft.com/en-us/library/csfk8t62(VS.85).aspx which lists  the derivation of trigonometric functions not provided by VBA.  Not included in this list is ATan2(), which is strange because this is the one trigonometric … Continue reading →

Posted in Excel, Maths, UDFs | Tagged | 7 Comments