Cody

John D'Errico

360
Rank
4
Badges
1155
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E-mail
Company/University Retired
Personal Profile

Mainly retired from Eastman Kodak. (Of course, Kodak itself is now semi-retired. I don't think I had any influence in that.) I still write MATLAB code as I find something interesting, and I do attempt to write new tools to put on the File Exchange when I think I can make a contribution.

However, I DON'T answer direct e-mail questions, and I do NOT do homework. In general, your homework is YOUR problem, not mine. Please do NOT e-mail me with your homework problems or student projects. If I was willing to answer your questions, I would very rapidly become overwhelmed, because one question is never just one simple question.

When I'm not doing something with MATLAB, you might find me playing bridge, either in the club or online on BBO.

Professional Interests: MATLAB, numerical analysis, mathematical modeling

Avocational interests: Bridge, woodworking, woodturning

Professional Interests

Bridge, MATLAB, numerical analysis, mathematical modeling

Activities

1 – 50 of 184

John D'Errico submitted Solution 943789 to Problem 123. Tell me the slope

on 27 Aug 2016 at 1:24

John D'Errico submitted Solution 940873 to Problem 44. Trimming Spaces

on 23 Aug 2016 at 18:36

John D'Errico submitted Solution 940864 to Problem 28. Counting Money

on 23 Aug 2016 at 18:22

John D'Errico submitted Solution 940844 to Problem 1925. Smith numbers

on 23 Aug 2016 at 17:05

John D'Errico submitted Solution 940842 to Problem 1925. Smith numbers

on 23 Aug 2016 at 17:05

John D'Errico submitted Solution 940833 to Problem 48. Making change

on 23 Aug 2016 at 16:48

John D'Errico submitted Solution 940794 to Problem 46. Which doors are open?

on 23 Aug 2016 at 15:37

John D'Errico submitted Solution 940778 to Problem 76. De-dupe

on 23 Aug 2016 at 15:06

John D'Errico submitted Solution 940774 to Problem 74. Balanced number

on 23 Aug 2016 at 14:54

John D'Errico submitted Solution 940771 to Problem 35. Quote Doubler

on 23 Aug 2016 at 14:48

John D'Errico submitted a Comment to Problem 174. Roll the Dice!

The first test case for this problem is flat out statistically terrible! In fact, it is quite easy for that assertion to fail on a well defined set of uniform dice! So if you submitted a "valid" solution to this trivial problem, and it failed, then re-submit it. It may well succeed the second time you try, with no change to your function at all.

on 23 Aug 2016 at 14:34

John D'Errico submitted Solution 940763 to Problem 174. Roll the Dice!

on 23 Aug 2016 at 14:31

John D'Errico submitted Solution 940357 to Problem 18. Bullseye Matrix

on 22 Aug 2016 at 15:45

John D'Errico submitted Solution 940354 to Problem 29. Nearest Numbers

on 22 Aug 2016 at 15:34

John D'Errico submitted Solution 940349 to Problem 115. Distance walked 1D

on 22 Aug 2016 at 15:22

John D'Errico submitted Solution 940313 to Problem 94. Target sorting

on 22 Aug 2016 at 14:47

John D'Errico submitted Solution 940299 to Problem 2950. Array of Ones

on 22 Aug 2016 at 14:40

John D'Errico submitted Solution 940186 to Problem 896. Sophie Germain prime

on 22 Aug 2016 at 12:26

John D'Errico submitted a Comment to Solution 940169

(lol) An expectedly poor score, but still fun to write it in recursive form. Accomplished by adding spare arguments both as input to and output from split_it, then calling split_it recursively as needed.

on 22 Aug 2016 at 12:08

John D'Errico submitted a Comment to Problem 660. Find a subset that divides the vector into equal halves

A basic one liner with intlinprog, but not an option in Cody. :)

on 22 Aug 2016 at 3:16

1 – 50 of 184