Comments for Mike on the MATLAB Desktop

Comment on Scoring in Cody by sean

sean — Fri, 10 Feb 2012 06:24:50 +0000

I amused myself for a few minutes doing this, but am a little frustrated by the policy of hiding the best scoring solution. How am I going to learn something new with that policy in place? If I knew a better solution, I would do it… Cody isn’t as valuable as it could be. It was almost a good idea to allow people to learn from others (possibly better) code. But no… Weird.

Comment on Calling Java from MATLAB, Memory Issues by Joseph Fitzgerald

Joseph Fitzgerald — Wed, 08 Feb 2012 23:06:17 +0000

When I call a Java method from Matlab, is the memory copied to the Java heap? And then when I return data from Java to Matlab is that data copied to the Matlab heap? If so, is this a big performance concern that I should try to optimize (reduce the passing of data between heaps)? Thanks!

Comment on MATLAB-Emacs integration is back by Codre

Codre — Wed, 08 Feb 2012 17:33:15 +0000

Hello,
I use emacs at about 180 chars width.
When using matlab-shell mode I can define a string variable “foo” up to that width s.t.
matlab> foo
returns the full string unwrapped.

However,when I query a vector or matrix “test”
matlab>test
matlab wraps the display at column 70

That seemed like a good clue and it suggested this was more of a matlab inside emacs problem than an emacs problem, but I haven’t figured out how to configure emacs to understand the terminal width when it’s running inside emacs..
I’ve tried
things like
(defcustom matlab-fill-fudge-hard-maximum 150
inside of matlab.el
without success.

Can anyone help ?

Thx,

Comment on Scoring in Cody by Amy Cutting

Amy Cutting — Wed, 08 Feb 2012 13:01:30 +0000

I like Cody, and since it doesn’t penalize for comments and descriptive variable names, I think it’s a good way to score. A second score for execution time would also be nice to see.

I am also interested in a Simulink Cody, although I understand that it would be much more labor intensive to create such a thing. I have several scripts written in Matlab that I cannot find a way to execute in Simulink (or embedded Matlab), so anything to help hone my Simulink skills is appreciated!

Comment on Scoring in Cody by Ned Gulley

Ned Gulley — Tue, 07 Feb 2012 19:04:32 +0000

It’s a fair point. One of the things we’ve tried to do is make it easy to update the test suite on the fly, so when you see a weak test suite, please leave a comment and hopefully the author will come back and strengthen the tests. I know I’ve done this several times. With a rich enough test suite, any hard-coded answer is certain to be longer than a proper answer. Anyone who still enjoys making look-up tables after that has a strange hobby.

Comment on Scoring in Cody by David Young

David Young — Tue, 07 Feb 2012 18:33:26 +0000

I’ve had some fun with Cody and I think it’s interesting – and I’ve learnt some things from others people’s solutions. I can see that the scoring system is a reasonable compromise, and although it can get a bit silly if you go for the absolute minimum size (’011′-’0′ instead of [0 1 1] for example), on the whole it’s good to push towards concise code. It encourages you to explore the full capabilities of different functions, which can be worthwhile.

One suggestion: I’d like to see richer test sets. Some of them are a bit minimal, and some solvers produce answers which are simply lookup tables to get the test cases right. I can’t see the point of doing this, but it’s disappointing when you look at what should be a really neat answer and it’s actually just a few if-else clauses. In some cases, where there’s a reference solution, you could have dynamically generated test data, but even without this you could vary things more – for example there are only 4×4 boards as tests in the Conway’s game of life problem.

Comment on Scoring in Cody by Ned Gulley

Ned Gulley — Tue, 07 Feb 2012 15:24:13 +0000

I wouldn’t expect Simulink Cody anytime soon, but it’s certainly possible if there’s enough interest. Anybody else interested?

Comment on Scoring in Cody by Michael Joslin

Michael Joslin — Tue, 07 Feb 2012 14:08:05 +0000

I really like cody. I don’t know how plausible this is but would it be possible to make a similar game for simulink?

Comment on Calling Java from MATLAB by Michael Katz

Michael Katz — Mon, 06 Feb 2012 21:09:02 +0000

@Ullas,
I’m afraid that I’m not familiar with the Lookup class. Please contact technical support for more detailed assitance.

@Ritu,
You need to make sure that class (or it’s jar) is on MATLAB’s java path. See the documentation: http://www.mathworks.com/help/techdoc/ref/javaaddpath.html. If you need further assistance, contact Technical support and they can walk you through it.

Comment on Scoring in Cody by JeanYves

JeanYves — Mon, 06 Feb 2012 19:16:25 +0000

Fantastic news! Can’t wait to see it!

You can have zillion of constraint ideas. Like

every line shorter than 10 characters
maximum of 3 pairs of brackets (limit number of function calls)
digits forbidden
…

Good luck, and again: fantastic game! I am learning so much doing it!