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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/

180Rank
8Badges
1375Score

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

Ned Gulley submitted a Comment to Problem 1674. How many jokers?

Hi Amitava: Could you provide an example in your problem statement? Also, as Evan says below, you should have more than one test case or it becomes a trivial matter to hard-code a particular answer.

on 24 Jun 2013

Ned Gulley submitted a Comment to Problem 162. High school cafeteria

I had assumed that "in order" meant "in the order provided". If that were the case, then [5 1 3 2 4] would return [5 3 2 1 4]. Maybe you could say you want them sorted rather than in order.

on 20 Jun 2013

Ned Gulley submitted a Comment to Problem 17. Find all elements less than 0 or greater than 10 and replace them with NaN

Fixed the wording to reflect this. Thanks for the comments.

on 20 Jun 2013

Ned Gulley submitted a Comment to Problem 1519. Identify Sequence in two arrays

John, you put in a lot of effort here and I'd like to see this work. But as it is, the test suite doesn't actually test anything. I don't understand the problem sufficiently to fix it myself.

on 19 Jun 2013

Ned Gulley submitted a Comment to Problem 1589. calculate linear convolution two vectors

I fixed the test suite so the number of parameters is correct.

on 11 Jun 2013

Ned Gulley submitted a Comment to Problem 1534. Sort (high on middle, low on ends)

Hi Franek: Thanks for creating a problem! It's a little ambiguous right now (see @andrea84's comment above). There is more than one answer as currently defined. Could you please clarify it?

on 3 Jun 2013

Ned Gulley submitted a Comment to Problem 1531. The rabbit problem

Hi Hussam. Thanks for the problem. The Fibonacci sequence can start different ways. Can you provide a specific example or two so there's no ambiguity?

on 30 May 2013