Author Archives: dougaj4

Solid Air

Posted on 21/08/2010 by dougaj4

by John Martyn with Danny Thomson on bass, a live performance in Dublin from 1987 Click to follow the link to You Tube (put your headphones on first) …

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2D Spline Interpolation with ALGLIB

Posted on 20/08/2010 by dougaj4

I have updated the ALGLIB Spline and Matrix Function spreadsheet to include 2D interpolation of tabular data, including both linear and cubic spline interpolation.  The spreadsheet including the new functions with full open source code may be downloaded from AL-Spline-Matrix03.zip … Continue reading →

Posted in AlgLib, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , | 6 Comments

Depiction and Excel Webinar

Posted on 18/08/2010 by dougaj4

Depiction is a low cost GIS program.  I received an e-mail today that they are hosting a webinar on using Depiction with Excel from 10-11 AM PDT on Wed 18th August.  Click here for details. Looks interesting, but it’s 3:00-4:00 … Continue reading →

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ALGLIB Statistics Functions

Posted on 16/08/2010 by dougaj4

I have recently imported all the ALGLIB statistics functions into VBA, and written interface functions where required, so that all the functions may now be used as User Defined Functions (UDFs) on the spreadsheet.  A spreadsheet including full open source code … Continue reading →

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

The hole through the middle of the Earth – filled with air

Posted on 13/08/2010 by dougaj4

Three air molecules go into a hole,  Well, I say three; could have been four or five.  Could have been nine or ten, doesn’t matter. Could have been fifteen, twenty – fifty. Round it up. Hundred. Let’s go mad, eh … Continue reading →

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