Rank: 1505 based on 70 downloads (last 30 days) and 4 files submitted
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Darren Rowland

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Files Posted by Darren View all
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(last 30 days) 		Comments Rating
05 Aug 2009 Puzzler: solution Solver for the puzzler posted by Doug Hull July 09 http://blogs.mathworks.com/videos/ Author: Darren Rowland algorithm, flood, puzzler 19 0
27 Apr 2009 FACTORADIC Obtain the factorial radix representation of a number. Author: Darren Rowland factorial radix, permutation, lehmer code, factoradic 25 1
  • 5.0
5.0 | 1 rating
22 Feb 2009 ONEPERM Obtain a single permutation of the numbers 1:N Author: Darren Rowland single permutation 14 0
22 Feb 2009 ONECOMB Obtain a single combination of N numbers taken K at a time. Author: Darren Rowland single combination, combinadic 12 0
Comments and Ratings by Darren View all
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  • 23
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13 Nov 2009 Moment method for impedance calculation of coupled dipole antenna The method used is Hallen's integral formulation of MOM Author: ujwol palanchoke

This is a script, and hardly likely to be useful for anyone except the author.

It could be improved by:
- converting to a function, complete with meaningful H1 line
- cleaning up the code to eliminate M-lint messages
- using the backslash operator for the solution of A.x = b, instead of inv
02 Nov 2009 Learn Basic Plotting Principles Powerpoint Slides on the fundamentals of plotting and using the function line() with animation. Author: Husam Aldahiyat

Now improved with accompanying source files, this contribution will be a great reference for users who are beginning to experiment with basic animated plots or guis.
Well done Husam.
20 Oct 2009 Learn Basic Plotting Principles Powerpoint Slides on the fundamentals of plotting and using the function line() with animation. Author: Husam Aldahiyat

I think that this submission is just slightly lacking. The slides are reasonably informative, but while I was reading them I couldn't help but think that it would be good for a new Matlab user to be able to try out the examples. Unfortunately the corresponding files are not included. I hope Husam can include the files to help beginners get started straight away.
Darren.

14 Sep 2009 Improvement to Title function Add the "title" string to figure title (blue area) Author: Yanai

Simple (only 4 lines of code) but very clever improvement to the basic behavior of title. I see no reason why this shouldn't be adopted into Matlab.
10 Sep 2009 Method for calculating precise logarithm of a sum Method for operating on log's of values without calculating the original values during the process Author: Roland Pihlakas

I can see this being a useful utility for some applications. However the code could be improved. I would like to see you add
- a H1 line
- an example (or two) showing usage, particularly comparing your method with a method which will produce overflow
- Comments within the code explaining the procedure so a user does not need to consult the pdf file

Lastly I think the actual computation should be on just one line
i.e. R = log(exp(a_ln - b_ln) + 1) + b_ln;
rather than spread out over many lines. Let comments explain the shifting.

Darren
Comments and Ratings on Darren's Files
  • 1 - 1 of
  • 1
Updated File Comment by Comments Rating
28 Apr 2009 FACTORADIC Obtain the factorial radix representation of a number. Author: Darren Rowland D'Errico, John

A useful tool when generating permutations. In fact, I was thinking of putting up this myself. No need to do so now.

Good help. Error checks. Simple engine.
Top Tags Applied by Darren
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algorithm, bad code, combinadic, factoradic, factorial radix
Files Tagged by Darren View all
  • 1 - 5 of
  • 5
Updated   File Tags Downloads
(last 30 days) 		Comments Rating
05 Aug 2009 Puzzler: solution Solver for the puzzler posted by Doug Hull July 09 http://blogs.mathworks.com/videos/ Author: Darren Rowland algorithm, flood, puzzler 19 0
27 Apr 2009 FACTORADIC Obtain the factorial radix representation of a number. Author: Darren Rowland factorial radix, permutation, lehmer code, factoradic 25 1
  • 5.0
5.0 | 1 rating
22 Feb 2009 ONEPERM Obtain a single permutation of the numbers 1:N Author: Darren Rowland single permutation 14 0
22 Feb 2009 ONECOMB Obtain a single combination of N numbers taken K at a time. Author: Darren Rowland single combination, combinadic 12 0
20 Jul 2007 Newton-Raphson Newton-Raphson method for all real roots of the polynomial. Author: Keerthi venkateswara Rao approximation, newton raphson, interpolation, approximations, bad code, newtonraphson 981 45
  • 4.10638
4.1 | 48 ratings
 

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