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# Category Archives: Excel

## Evaluating text with units and finding the neutral axis

A few weeks ago a comment asked for guidance on finding the moment capacity of a reinforced concrete section. This post will look at finding the depth of the neutral axis (NA) in a rectangular section, with a single layer of … Continue reading

Posted in Beam Bending, Concrete, Excel, Maths, Newton, UDFs, VBA
Tagged depth of neutral axis, elastic analysis, EvalU, evaluate text strings, evaluate units, Excel, Reinforced Concrete, UDF, ULS analyis, unit aware, VBA
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## On not using Hungarian Notation, and VBA shortcuts

In June this year Michael Alexander at Bacon Bits had a post on using Hungarian Notation (or not). It contained the following quote from Stackoverflow, which for me sums up excellently a good reason for not using it: “vUsing adjHungarian nNotation vMakes … Continue reading

## The Countif bug (and how to avoid it)

The Countif function counts the number of cells in a range that match some criterion. If we enter 1,2,3 in cells A1:A3 and enter =COUNTIF($A$1:$A$3,A1) somewhere else, it will return 1: But if we enter three text strings with 16 … Continue reading

Posted in Computing - general, Excel
Tagged bug, CHAR(173), COUNTIF, Excel, Sum, Sumproduct
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## Excel Uservoice and Python for Excel

The Excel Uservoice site is a forum for users to post suggestions for improvements to Excel. A suggestion to add native Python support to Excel, as a replacement to VBA, has had by far the most votes since the start, and … Continue reading

Posted in Computing - general, Excel, Link to Python, VBA
Tagged Excel, Python, survey, uservoice, VBA
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## Section Properties with MeshPY, including torsion and warping

I recently discovered robbie van leeuwen’s structural engineering blog, which has an open-source set of Python routines for calculation of section properties, including torsion and warping constants. The program uses the MeshPY Library for generating the finite element meshes required … Continue reading

Posted in Beam Bending, Concrete, Excel, Finite Element Analysis, Frame Analysis, Link to Python, Maths, Newton, Numerical integration, NumPy and SciPy, Strand7, UDFs, VBA, xlwings
Tagged Excel, MatPlotlib, MeshPY, Python, section properties, Torsion, UDF, VBA, Warping
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## Brent’s Method; Update and Examples

Has the free software at this site saved you time and/or money? If so, please contribute to the Raw Impact charity group providing practical help to poor communities in Cambodia: Everydayhero – Cambodia 2018 All contributions gratefully accepted. Contributions are … Continue reading

Posted in Arrays, Excel, Maths, Newton, UDFs, VBA
Tagged Brents method, Excel, inverse quadratic, iterative solution, Maths, UDF, VBA
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## Update to AL-Spline-Matrix

Posted in AlgLib, Excel, Maths, Newton, UDFs, VBA
Tagged AlgLib, Cubic spline, Excel, spline curve fitting, UDF, VBA, weights and constraints
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