Tag Archives: UDF

Getting hard disk physical serial numbers

Posted on 21/11/2010 by dougaj4

There was a question at Eng-Tips about how to get the physical serial number of a hard disk (rather than the soft number, that is changed by a re-format): http://eng-tips.com/viewthread.cfm?qid=285948&page=1 A search found this discussion with the answer: http://thedailyreviewer.com/office/view/programmatically-obtain-the-hard-disks-serial-number-from-vba-101853101 (see answer … Continue reading →

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

Tanh-Sinh Quadrature update

Posted on 20/10/2010 by dougaj4

Graeme Dennes has been continuing work on his Tanh-Sinh Quadrature function, and recently sent me a revised version, which can be downloaded from: Tanh-Sinh.zip The main change is a new automatic tolerance adjustment feature which automatically increases the tolerance for … Continue reading →

Posted in Excel, Maths, Newton, Numerical integration, UDFs, VBA | Tagged , , , , , , , | 9 Comments

Faster Integration with the Tanh-Sinh Method

Posted on 10/10/2010 by dougaj4

In my previous post about numerical integration I mentioned that I would be writing about another lesser known method providing better speed and/or accuracy in many cases.  The method is known as Tanh-Sinh quadrature, and has been implemented in Excel by a reader … Continue reading →

Posted in Excel, Maths, Numerical integration, UDFs, VBA | Tagged , , , , , , , | 3 Comments

Working with FEM data and using the dictionary object

Posted on 26/09/2010 by dougaj4

This post features an Excel User Defined Function (UDF) to count the number of different element types (beams, plates, bricks and links) and the number of node restraints at each end of listed beams from a finite element model.  The … Continue reading →

Posted in Arrays, Excel, Finite Element Analysis, Newton, UDFs, VBA | Tagged , , , , , | 5 Comments

Complex Numbers and Solving Quartic Polynomial Equations

Posted on 19/09/2010 by dougaj4

It was recently pointed out to me that the User Defined Function (UDF) for solving quartic polynomial equations presented in this post returned an error for some input values.  In tracking down the source of the error I decided that it … Continue reading →

Posted in AlgLib, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , | 2 Comments