Category Archives: Charts

EvalA update and examples

Posted on 06/08/2013 by dougaj4

The EvalA User Defined Function (UDF) has been included in the Eval2 and Eval-Integration spreadsheets for some time, but was not documented.  That has now been fixed, and both spreadsheets can be downloaded from Eval2.Zip (including full open-source code). The … Continue reading →

Posted in Arrays, Charts, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , | Leave a comment

Daily Download 22: Splines and Curves

Posted on 08/10/2012 by dougaj4

Since it was first published in 2009 my CSpline function has been the most popular download from this site.  CSpline (and various associated functions) is used to fit a series of cubic curves through specified points, allowing interpolation along a smooth … Continue reading →

Posted in AlgLib, Beam Bending, Charts, Charts, Coordinate Geometry, Excel, Newton, Numerical integration, UDFs, VBA | Tagged , , , , , , , , | 7 Comments

Daily Download 20: Section Properties

Posted on 06/10/2012 by dougaj4

The download spreadsheets today provide functions to find section properties of shapes either defined by coordinates or selected from a list of shape types.  The section properties found are: area, first and second moments of area about the X and Y … Continue reading →

Posted in Charts, Coordinate Geometry, Drawing, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , | Leave a comment

When is an XY chart not an XY chart …?

Posted on 05/09/2012 by dougaj4

… and whan is a blank cell not a blank cell? To answer the first one, create a simple XY chart, with a single data range of 7 rows, with a blank row in the middle.  This should display as two … Continue reading →

Posted in Arrays, Charts, Charts, Excel, UDFs, VBA | Tagged , , , , , | 18 Comments

Dynamic Excel on the Cloud With Javascript!

Posted on 16/12/2011 by dougaj4

I have previously linked to a spreadsheet stored on Skydrive, but I have been disappointed that the possibilities for using live spreadsheets are greatly limited by the lack of support for VBA.  It seems that Microsoft have now decided to provide … Continue reading →

Posted in Animation, Charts, Computing - general, Excel, Javascript | Tagged , , , | 1 Comment