Category Archives: UDFs

Tanh-Sinh Quadrature via F2PY

Posted on 31/01/2016 by dougaj4

Fast and accurate numerical integration routines based on the Tanh-Sinh method are available as Excel VBA based functions in the Tanh_Sinh Quadrature spreadsheet by Graeme Dennes.  Graeme’s VBA code is based on open source Fortran code by Takuya Ooura, which … Continue reading →

Posted in Excel, Fortran, Link to Python, Maths, Newton, Numerical integration, NumPy and SciPy, UDFs, VBA | Tagged , , , , , , , , | Leave a comment

xlSciPy – Python SciPy for Excel; Update with new functions

Posted on 04/01/2016 by dougaj4

The xlSciPy spreadsheet, previously described here, has been updated with new functions for integration, finding equation roots and maxima and minima, solving systems of non-linear equations, and evaluation of equations entered as text.  The new version (including full open-source VBA … Continue reading →

Posted in Excel, Link to Python, Maths, Newton, Numerical integration, NumPy and SciPy, UDFs, VBA | Tagged , , , , , , , , , , | Leave a comment

Worksheetfunction.Transpose – changed behaviour in Excel 2013 and 2016

Posted on 01/01/2016 by dougaj4

It is (fairly) well known that when using Worksheetfunction.Transpose on an array in VBA the array must be no more than 65,536 (2^16) rows long, or it will return an error. Recently when using Excel 2016 (32 bit) I thought … Continue reading →

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

ConBeamU 4.08

Posted on 29/11/2015 by dougaj4

The continuous beam spreadsheet has had another update to fix a problem when point loads were applied to cantilevers, and the first support position was not listed as an output point.  The new version (4.08) can be downloaded from: ConbeamU.zip … Continue reading →

Posted in Beam Bending, Excel, Finite Element Analysis, Frame Analysis, Newton, Strand7, UDFs, VBA | Tagged , , , , , , | 1 Comment

Importing Text Files; Unix Format

Posted on 10/11/2015 by dougaj4

Text files generated on Unix systems have a different convention to denote the ends of lines to that used on Dos/Windows systems (see Newline for more details).  This was causing problems with the Text-in2 spreadsheet, with small files being imported with … Continue reading →

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