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12:28 AM
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Q: A rambling about beginner's participation and how to stimulate it

belisariusI started to ramble about this a while ago, but this question issued today fired up some structured thinking that I'd want to share and discuss. The question in question is a very simple one, and when I saw it I thought -"I'll leave it for someone less experienced"-, and it happened. Two users...

 
12:54 AM
@rm-rf You here?
 
1:19 AM
@belisarius here now
 
@rm-rf Hi! You may be interested in my last post in meta
 
@belisarius yup, read it and upvoted it... I have nothing to say (yet) :)
 
@rm-rf Ok. Think about it. I'm sure you will get to something :)
 
1:45 AM
Very confusing. This guy wants to be able to use a space for his non-commutative multiplication, and then he also demands that Times[] still be compatible with his objects. Is typing ** really so hard on his sensibilities?
 
6 hours ago, by belisarius
@rm-rf It's like firing a gun on your toes
 
@J.M. Yeah, he's starting to be annoying... the other day, I saw his SO question, where he wanted to be able to type 0123 and not have it convert to 123. And before you ask, strings are out of the question and he'd down vote (if he had the rep)
I can never understand the type of folks who'd rather get others to write humongous auxiliary code just for them to be able to use C syntax in Mathematica, than spend a day learning the right syntax
 
@rm-rf Begin["CHabitsIDontWantToChange`"]
 
@rm-rf I have to admit that Mma is very idiosyncratic in some aspects, and people coming from other geographies may have some hard time to accept it
 
@belisarius Paradigm shifts were never easy, yes. :)
 
2:02 AM
@J.M. Not only a paradigm change, since in Mma, several paradigms are implemented without the docs explaining it clearly since the start, but also some kind of Big Brother looking over your shoulder and deciding how the format of your expressions ought to be. I remember that as very frustrating in my first days with Mma
printf() ... you know ? :)
 
@belisarius :D
 
 
2 hours later…
3:36 AM
@J.M. You here?
 
@rm-rf Yes, what can I do for you?
 
Isn't MATLAB's A \ b the same as LinearSolve[A, b]?
(or the other way around... )
 
@rm-rf Almost. MATLAB's backslash can handle least squares as well, while in Mathematica, LeastSquares[] is a separate function.
 
@J.M. Aha! Yes, that's what I missed. Thanks :)
 
You're welcome. :)
 
4:19 AM
I wonder why there's a discrepancy between Get["! date +%s"] and AbsoluteTime[] - AbsoluteTime[{1970, 1, 1}]? On my computer, they agree to only three digits...
 
 
1 hour later…
5:34 AM
I'm trying to run the code given by PlatoManiac here: mathematica.stackexchange.com/questions/10453/…
but I get a error: $RecursionLimit::reclim: Recursion depth of 256 exceeded. >>
After some trial, I found the reason is, a step size for the Table is set in the pics
i.e. If I delete the ,30 in the pics, everything will be OK
and after I finished running the pics without a step size, it will be available to add any step size in {n, 0, timesteps}.
What's wrong with it? Is it a bug or just something is wrong with my mma? I use mma 8.0.4, and my OS is Windows Vista Home Basic 32bits.
 
6:16 AM
Just now, I found that the same error still comes out if I delete pics in the code at the very beginning, and this time I don't know how to avoid it…
 
 
11 hours later…
5:07 PM
@everyone: a straightforward question: is there a way to sort all questions asked by marks in answers rather than questions?
 
@chris so essentially get the highest voted answers?
 
@rm-rf exactly thanks !
 
you're welcome :)
 
 
6 hours later…
10:56 PM
@belisarius I made good use of it in this answer of mine on the country flag question. Good work!
The first answer that went above Stackexchange character limit. I wonder how often this has happened to Leonid ;-)
 
acl
11:26 PM
@Sjoerd nice answer
 

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