File Exchange Pick of the Week

February 8th, 2008

Sudoku solver

One of the comments that came from the survey we did a few weeks ago is that people miss the traditional Pick of the Week format. I have invited a few guest bloggers to help me choose files each week. This week Robert Bemis will be making a fine choice:

Also, Congratulations go to Jason Brown for winning the MATLAB t-shirt for participating in the survey that appears after most movies I put out there each week. Win your shirt by answering this month’s survey.

Now on to our guest blogger:

It’s been a while since our last Sudoku “Pick of the Week,” and there are plenty to choose from. So this week’s pick is Sudoku (Dancing Links Solver). Per-Anders Ekstrom did a first-rate job with this GUI. The screen shot doesn’t do it justice. My favorite features not described on the submission page are the solver options to show candidates and/or mistakes, and the solver option to block invalid moves. These options were so fun I wished there were hot keys to toggle them without going through the Solver menu. (Hint: edit lines 110-112; add Accelerator property.)

Note: fans of MATLAB and Sudoku might also check out the November 2006 Sudoku contest or the twenty some other Sudoku submissions.

sudoku.PNG

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<pre class="code">
a = magic(3);
sum(a)
</pre>

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Bob, Brett & Jiro share their favorite user-contributed submissions from the File Exchange.

  • Zach: Hi Doug and Les, I didn’t have a lot of time to mess with this, but I did find a work-around. I plotted...
  • hamed: k
  • Les: @Zach This isn’t exactly what you are looking for but at least it puts all three parameters on the same...
  • Zach: Thanks for your suggestions Doug. I’ll give that a shot and see what happens. I’ve seen many of...
  • Doug: @Zach, I would say to use plotYYY, because that is close to what you want, but using depth as Y makes sense....
  • Doug: @Teja, I think this will work: http://www.mathworks .com/access/helpdesk /help/techdoc/ref...
  • Gify: merry christmas :) nice christmas tree! Regards, Janet Gify
  • Teja: Dear Doug Is there anyway to plot a surface from nonuniform data without meshgrid and griddata? Basically i...
  • Zach: I’m working with geophysical data, so I’d like to produce a depth profile. The y-axis would be...
  • Doug: @Ashok First, please do not use variable names that are MATLAB commands (std and mean). Second, p(j) should be...

These postings are the author's and don't necessarily represent the opinions of The MathWorks.