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the cyclist

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Researcher and Director of Data Science at PatientsLikeMe.com; MATLAB evangelist.

Professional Interests

Predictive modeling, statistics

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the cyclist submitted a Comment to Solution 406838

New test suite invalidates this solution.

on 20 Feb 2014

the cyclist submitted a Comment to Problem 2202. Flip the bit

Added this check. (I messed it up a bit the first time I tried to do it, so sorry for some interim weirdness.)

on 20 Feb 2014

the cyclist submitted Problem 2202. Flip the bit to Community

on 20 Feb 2014

the cyclist received Leader badge

on 13 Feb 2014

the cyclist submitted a Comment to Problem 320. Maintain shape of logical-index mask

Good suggestion. I've added a couple more tests to the suite, including one that has three columns in the logical mask.

on 13 Feb 2014

the cyclist submitted a Comment to Solution 363762

http://www.mathworks.com/help/matlab/ref/assert.html

on 4 Dec 2013

the cyclist submitted a Comment to Problem 160. So many choices

@Sumit, you are probably using a function from a toolbox (e.g. statistics toolbox) that is not available to Cody.

on 11 Sep 2013

the cyclist submitted a Comment to Solution 203610

I added a test case to nullify this "solution".

on 25 May 2013

the cyclist submitted a Comment to Solution 214423

This solution only tests for divisibility by 9, not whether the number is a Kaprekar number.

on 9 Mar 2013

the cyclist submitted a Comment to Solution 27245

Added to test suite to eliminate this "solution".

on 9 Mar 2013

the cyclist submitted Solution 214704 to Problem 151. Magic!

on 8 Mar 2013

the cyclist submitted Solution 214703 to Problem 151. Magic!

on 8 Mar 2013

the cyclist submitted Solution 214702 to Problem 151. Magic!

on 8 Mar 2013

the cyclist submitted Solution 214701 to Problem 151. Magic!

on 8 Mar 2013

the cyclist submitted a Comment to Problem 151. Magic!

The MATLAB command magic(2), although it does produce output, is not a magic square, according to the definition. (There is no 2x2 magic square.)

on 8 Mar 2013

the cyclist submitted a Comment to Problem 151. Magic!

I was not notified about some of the older comments, so was unaware of some of the weaknesses of the test suite, and the "gamed" solutions. I have substantially improved the test suite.

on 8 Mar 2013

the cyclist submitted a Comment to Problem 162. High school cafeteria

I somehow Alfonso's older comment until I saw Tom's newer one. Alfonso: I've added a non-sorted test sample, and had the problem rescored. Tom: 1 is neither prime nor composite. I've added instructions on how to handle that.

on 27 Feb 2013