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Ned Gulley

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Company/University

MathWorks

Personal Profile

I work on the MATLAB Central and MATLAB Interface teams. See also http://www.starchamber.com/

182Rank
8Badges
1405Score

Ned Gulley submitted a Comment to Problem 2265. 2048 Next Move

Nick Howe says he's done it, and now he's working on 8192.

on 2 Apr 2014

Ned Gulley liked Solution 424819

on 1 Apr 2014

Ned Gulley submitted Problem 2265. 2048 Next Move to Community

on 31 Mar 2014

Ned Gulley submitted a Comment to Problem 2259. Best Fit RMS

Nice problem Swapnali! Since it has a floating-point answer, you should specify how many significant digits you're looking for, or include a tolerance term in your test suite.

on 31 Mar 2014

Ned Gulley liked Solution 418239

on 25 Mar 2014

Ned Gulley submitted a Comment to Problem 1720. Do the lines intersect?

Hi Celestino. I added a little bit more clarifying text to the problem statement. That's an interesting test case, but not one I will use for this problem. You could make your own extension to this problem, though!

on 12 Mar 2014

Ned Gulley submitted a Comment to Problem 2215. Power supply: 230V to 115V

J-G, thanks for the problem. Could you add some more information about expected inputs and outputs? An example and some more tests would be helpful too. If your test suite has exactly one test, it's trivial to write a correct answer.

on 25 Feb 2014

Ned Gulley liked Problem 2202. Flip the bit

on 21 Feb 2014

Ned Gulley submitted a Comment to Problem 317. Find the stride of the longest skip sequence

I added another test and rescored. It appears that DIST no longer works. The DIST function is from the Neural Networks Toolbox. It shouldn't have worked in the past, but since it did, it played a part in a lot of answers. Sorry for the discontinuity.

on 13 Feb 2014

Ned Gulley submitted a Comment to Problem 660. Find a subset that divides the vector into equal halves

Aryaa: Your solution looks good. The problem is that combnk is in the Statistics Toolbox, and Cody is designed to use only functions from basic MATLAB.

on 3 Feb 2014

Ned Gulley liked Solution 202054

on 29 Jan 2014

Ned Gulley submitted a Comment to Problem 2118. Test of Quiz

Hi Petr: Keep in mind that your test suite isn't hidden in Cody. For that reason, Cody isn't the best place to ask questions that have a single correct answer (i.e. the answer doesn't change depending on novel inputs).

on 15 Jan 2014

Ned Gulley submitted a Comment to Problem 2068. Determine the square root

I made the suggested change to the test suite and re-scored.

on 14 Jan 2014

Ned Gulley submitted a Comment to Problem 2007. Swap two numbers

I cleaned up the test.

on 20 Nov 2013

Ned Gulley submitted a Comment to Problem 660. Find a subset that divides the vector into equal halves

I added a new test. I periodically strengthen test suites to defeat look-up table strategies.

on 19 Nov 2013

Ned Gulley submitted a Comment to Solution 333168

Clever! If the system doesn't work properly, work around it.

on 15 Oct 2013

Ned Gulley submitted a Comment to Problem 1927. Find nth maximum

I went ahead and made the test suite change that José suggested above.

on 15 Oct 2013

Ned Gulley submitted a Comment to Solution 327824

An "outstanding" from Alfonso is worth two outstandings.

on 4 Oct 2013

Ned Gulley submitted a Comment to Problem 1912. Local Minima

Maybe the problem statement should specifically exclude the first and last elements?

on 4 Oct 2013

Ned Gulley submitted a Comment to Problem 1812. Tridiagonal

I fixed the test suite so that n is used instead of d.

on 15 Aug 2013

Ned Gulley liked Solution 232044

on 8 Jul 2013

Ned Gulley liked Solution 274429

on 8 Jul 2013

Ned Gulley submitted a Comment to Solution 273246

@Disha: see http://en.wikipedia.org/wiki/42_(number)#The_Hitchhiker.27s_Guide_to_the_Galaxy

on 8 Jul 2013

Ned Gulley submitted a Comment to Problem 1686. Generate a melodic contour string matrix

Amazing how hard it is to get your test suite right on the first try. Thanks, and it looks like you're in the lead!

on 28 Jun 2013