Category Archives: VBA

Finding all range names in a specified range

Posted on 24/01/2011 by dougaj4

Another useful little snippet from Eng-tips. There was a question regarding how to list all the range names applied to a specified cell.  Forum members electricpete and MintJulep came up with a short macro to do the job, which I have … Continue reading →

Posted in Excel, UDFs, VBA | Tagged , , , | 2 Comments

Evaluating higher order polynomials …

Posted on 17/01/2011 by dougaj4

… and a better solution for quadratics. Having written a better solver for high order polynomials, that raises a few other issues.  The error in the roots found by the RPolyJT was checked by simply substituting each root as the … Continue reading →

Posted in Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , | 4 Comments

Solving higher order polynomials

Posted on 13/01/2011 by dougaj4

The Quartic spreadsheet presented here previously (most recently here) uses algebraic techniques to provide an “exact” solution to polynomial equations of up to fouth order.  For polynomials of higher order there is no general algebraic solution, and numerical methods are … Continue reading →

Posted in Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , | 12 Comments

LatPile update

Posted on 11/01/2011 by dougaj4

I have just posted an update to the LatpilePY spreadsheet, fixing a bug in the way in which it read the first row of data from input PY curves, which was resulting in the program failing to run if there were … Continue reading →

Posted in Concrete, Excel, Geotechnical Engineering, Newton, UDFs, VBA | Tagged , , , , , , | 2 Comments

Buckling of rings and arches

Posted on 01/01/2011 by dougaj4

In 2007 I wrote a paper on buckling of confined steel tunnel liners for the ANZ Geomechanics Conference in Brisbane, and in the course of that I noticed that the calculated buckling load of an unconstrained pipe subject to uniform radial load was significantly … Continue reading →

Posted in Arch structures, Beam Bending, Excel, Newton, VBA | Tagged , , , | 15 Comments