Rank: 1098 based on 122 downloads (last 30 days) and 11 files submitted
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Bill McKeeman

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Company/University
Dartmouth College
Lat/Long
43.70682144165039, -72.28643035888672

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I retired as a MathWorks Fellow and am a part-time teacher at Dartmouth.


 

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Files Posted by Bill McKeeman View all
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(last 30 days)
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13 Apr 2010 Screenshot Solutions to the Soma Cube The 240 unique solutions to the Soma Cube. Author: Bill McKeeman puzzle, soma cube, combinatorics 4 0
09 Nov 2009 Screenshot World Time Zones Convert between local time and UTC. Get local time in various places in the world. Author: Bill McKeeman communications, travel, time zones, local time, utc, gmt 19 8
  • 5.0
5.0 | 3 ratings
29 Jun 2009 Screenshot Tumbling Bucky Ball A MATLABĀ® function that displays Bucky Ball (Fullerene) tumbling in space. Author: Bill McKeeman gallery, matlab, pentagons, hexagons, tumbling 10 1
  • 5.0
5.0 | 1 rating
25 Jun 2009 Screenshot Wind Fern blowing version of Fractal Fern Author: Bill McKeeman gallery, fractal, blowing, fractal fern, fern, frond 12 0
25 Jun 2009 Screenshot Can a tiny compiler-compiler grow into something useful? A grammar executing machine is used to build compiler-like programs (talk only). Author: Bill McKeeman compiler, execution, backtracking, inversion, context free grammar, self description 8 0
Comments and Ratings by Bill McKeeman View all
Updated File Comments Rating
29 Nov 2009 World Time Zones Convert between local time and UTC. Get local time in various places in the world. Author: Bill McKeeman

Patrick, I considered DST, and implemented entries in case the use knew DST was in effect. Tabulating DST, even for the U.S., required knowing geographical boundaries for the surprisingly varied laws regulating time. Such an effort was well beyond my own needs, and probably more work than payoff except for customers like AMTRAK. I would be interested in someone else trying it, but not me.

08 May 2009 Growing a Compiler Bootstrap compilers starting from a tiny compiler-compiler. Author: Bill McKeeman

Some of the internal links are broken. I'll fix them as soon as I find out how.

24 Mar 2009 Variable Precision Integer Arithmetic Arithmetic with integers of fully arbitrary size. Arrays and vectors of vpi numbers are supported. Author: John D'Errico

I am impressed the scope and presentation of this toolbox. Very nice work. I have a couple of nits to comment upon.
The last example in vpi.m seems to have lost its text.
I recommend that the examples be such that, if cut and pasted to the command line, run. I did this with my World Time Zones FX entry in response to a criticism and was pleased at the result.
I experimented with replacing
INT.digits = double(fliplr(N))-48;
with
INT.digits = int8(fliplr(N))-int8('0');
The package still seems to run and takes 8x less storage for the vpi numbers.

Comments and Ratings on Bill McKeeman's Files View all
Updated File Comment by Comments Rating
01 Dec 2014 World Time Zones Convert between local time and UTC. Get local time in various places in the world. Author: Bill McKeeman Martin Foltin

It doesn't work with summer and winter time :(

25 Oct 2012 World Time Zones Convert between local time and UTC. Get local time in various places in the world. Author: Bill McKeeman VT

thank you, works perfectly

23 Sep 2011 perms even, odd, cyclical, unique permutations of a set of vectors Author: Bill McKeeman Bill McKeeman

The version of perms has a bug. It sometimes gives the even permutations instead of the odd permutations and vice versa. It has been corrected and reissued as FX32978. This version, FX10237 should soon be deleted.

14 Feb 2011 World Time Zones Convert between local time and UTC. Get local time in various places in the world. Author: Bill McKeeman David Goldsmith

Re: Erwin Mayer's contribution

But requires the Financial Toolbox

24 Aug 2010 World Time Zones Convert between local time and UTC. Get local time in various places in the world. Author: Bill McKeeman Tanyer Alan

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