Monthly Archives: August 2010

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

Three blokes go into a pub …

Posted on 13/08/2010 by dougaj4

“…  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 – two-fifty. Tell you what, double … Continue reading →

Posted in Bach | Tagged , , , | 1 Comment

AlgLib Complex Number Functions

Posted on 11/08/2010 by dougaj4

The AlgLib module ap.bas includes complex number functions which can be called from other VBA routines, but they cannot be used as User Defined Functions (UDFs)  because they use the user defined data type “Complex”: To  call these functions from the … Continue reading →

Posted in AlgLib, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , | 2 Comments

Buckling of columns with varying cross section

Posted on 09/08/2010 by dougaj4

Following a post in the Eng-Tips Forum about finding the buckling load of a stepped strut I have modified the Frame4 spreadsheet to carry out a buckling analysis of any straight member subject to axial load, including stepped or tapered cross … Continue reading →

Posted in Beam Bending, Excel, Frame Analysis, Newton, VBA | Tagged , , , , , , , | 27 Comments