@TedErsek If you feel that a particular answer to your question has given you the solution you were looking for, there's a check mark below the voting arrows which you can select to mark that answer as having been "accepted".
I have a differential system like
dx/dt = A x(t) + B y(t)
dy/dt = C x(t) + D y(t)
where A, B, C, and D are real constants. Now I need to explore the behavior of the system if A, instead of being a constant number, is a random number uniformly distributed between a given range. I just need to c...
@Szabolcs I'd vote for "Just use the existing beautiful masterpiece of a logo until we get an official notice from Wolfram", but that might be too confrontational or non-constructive.
@Ajasja The problem is: the SE team is already in contact with their legal dept and they did already say that the original logo is too similar to the Mma one
@TedErsek Can you post a link to the particulat question you're talking about? The star is next to the question (on the top), while the checkmark button is next to the asnwers (below).
@TedErsek For example, try on this question. There should be a checkmark button next to the answer (but not next to the question).
@Leonid Have you seen this question about a Mathematica package manager? You mentioned before that you were thinking about the design of something similar. I'm asking because I'd like to add an auto-updater to the image upload palette (which is a much less ambitious but related task). I want to avoid re-implementing things others have already written.
@halirutan As I understand from the chat transcript, the discussion was between the responsible people at WRI (most likely not the people who contribute to this site) and SE employees (Jin?) I don't think we can see the discussion (see here)
@halirutan I guess we just have to accept that both SE and WRI are in this country ...
Okay, that webpage I linked is probably not an accurate source of information :)
@Szabolcs I don't think so. Why would an automatic translator capitalize all the words? I think this comes from someone whose native language supports many capital letters (like German :)
@halirutan I thought German was the only such language ... and wouldn't they learn on their first English class that they're not supposed to capitalize? I don't remember much from my (mostly useless) German classes, and I definitely couldn't write such a question in German, but I do know what to capitalize!
What I really hate is... the use of ... this kind of suggests you have to read between the dots which you actually can't. So the dots are pretty useless
@Szabolcs You capitalize all real and imaginary things like Apple, Tree, Guitar but even Government, Sky and Imagination.
Btw, now that you say it, I cannot think of another language too which uses capitalizes.
@halirutan I do remember that much :-) I had German as "second foreign language" in school. Unfortunately even the teachers thought that we're overworked, and in practice it was demoted to an "unimportant subject", with teachers changing almost every year. So I didn't learn much :-( I wish German had been my first foreign language, and English the second one. We all learn English anyway, it's unavoidable these days.
The name seems to be Indian (Tamil). That would explain things: English is an official language there, and people may be ashamed to ask for help with English, they are simply expected to know it. The native script doesn't have capital and small letters.
As a native Hungarian speaker who is a Romanian citizen, it's much more difficult to learn Romanian for me than to learn English because I'm just "supposed to know" Romanian, and I can't treat it as a foreign language that I can learn at courses. I just need to pick it up.
If I have trouble with English, I'm never shy to ask :)
It's similar in Malta too---it took me some time to even discover that there are people who don't speak much English here. When you try to talk to people on the street it never happens that they refuse to speak English and it almost never happens that they even admit that they don't speak it well. They either try to help with the few words they know, trying to hide the fact that they have difficulties, or they quickly ask another person on the street.
I was told by one person here that language is tied to class. Upper classes speak English. She said in her experience it's similar in India. I don't have first hand experience with this though. I don't understand the local society well.
This whole language-class thing is very foreign for me. If we ever had it, communism has wiped it out.
It's almost as if he's trying to be annoying... there is no particular pattern there. No txt speak, no slang... it's mostly correct, but annoyingly capitalized and highlighted.
@RM Do you think he could be an Indian who doesn't speak good English and is confused about capitalization (my comments above)? Both Indians and Chinese have a tendency to mess up capitalization. I think it might be because the native script doesn't have this.
He is Indian, but the capitalization doesn't make sense. Even if he genuinely had trouble, I think I've told him about 3 times, belisarius told him yesterday and he still continues to write this way. He ought to at least make a better effort.
The reason I think he's doing it deliberately, is because he used correct capitalization (for the most part) in this question, which was his first. Note that it has not been edited, so all of it is his. No ellipsis, no arbitrary caps
His next question was also fine. Grammar and small spelling mistakes are fine, we can easily correct them. However, I see a deliberate pattern here that is inconsistent with his first couple of questions
Either that or he's sharing his account with someone else and they may/may not be asking with his knowledge
@RM I warned him one last time. If he's going to repeat this again this will be the first time I'll suspend a user. He's indeed Indian, how did you know?
I used to use CAD(autocard mostly) to create more complex geometric shapes, because of the precision it provided. That was so long ago. Now I only use Illustrator, which isn't great for this type of thing.
@SjoerdCdeVries maybe it's better to just keep closing the questions if they keep posting them like that. doesn't suspending sounds a bit extreme for this? I mean, they're not really disrupting anything or causing any real trouble, just annoying some of us (myself included)
@rcollyer I have a Bahraini friend. He told me about how 52°C and 90% humidity isn't unusual there, which is truly life-threatening heat. Have to go everywhere in an air-conditioned car.
Mathematica Summer Camp ran July 1–13 at Curry College. This year we had 22 high school students from all over the world who came together to learn Mathematica. By the end of camp, each student created his or her own Mathematica program, which they presented on Friday. They all worked hard to complete their projects [...]
@SjoerdC.deVries He's likely right. It hampers us, but we do only use some of the measures, not the full imperial system.
Hey, I know: one of the mods needs to create a new user to display the WRI blog in here and use the original (legally suspect) logo for it's identifier!
So, can I. It probably would take a full generation to convert over, and until then, it would be a bit chaotic. Which is just what our Congress needs at the moment ... :P
@SjoerdC.deVries At least we already had a decimal system. I wonder how long it took for britons to get used to their new monetary system when they moved from imperial to decimal.
@rcollyer If you read "the shock doctrine" by Naomi Klein you'll see that many in congress believe times of turmoil are the perfect moments to sneak in dramatic changes
whatever works, although, I'm not sure that does ... However, in the first semester physics lab, a friend had on the test she gave: give me the speed of light in furlongs per fortnight. :)
@Jin Halirutan had a pretty nice tile (see the first one) that is repeatable in any direction. Wasn't sure if you noticed it (was posted only a few hrs ago)
@Szabolcs Yes, I saw that question on package manager. All I can say right now is that the work is underway. We started from another end of the problem - namely, with the loader which would be based on a fine-grained file format and handle namespaces automatically, so that people won't always have to bother coming up with a full-fledged package for every code snippet they want to share.
@Szabolcs The component which would actually allow easy installs and dependency tracking we did not start with yet. The thing is, it will depend on the final file / project format we end up with. I will review how strong is the coupling. If I see that it is not too strong, I may start working on that component in parallel to produce some simple but usable version.
@Szabolcs So, in other words, I can not offer you much right now. I hope that we have some minimally usable version of the framework we are working on , by the end of the summer. I may have some very basic version of the package manager sooner than that, if I manage to decouple that substantially from the other component. One reason why I did not want to rush with that is that if we happen to change the interface a lot during development, the early users of the framework will suffer the most.
@LeonidShifrin I think I'll go ahead and write the updater then, or at least an update checker. I need people to have the newest version of the palette so they can test it. May I ask who you're working with on the package manager?
@acl How can you handle that? We had 41 the other day here in Malta and I thought I was not going to survive ... (living on top floor BTW, flat roof). I think Malta is pretty similar to Cyprus in climate (well, maybe it has fewer trees)
@Szabolcs personally I don't handle it at all, I just lie around doing nothing until it's evening. but then I am only there for holidays. I guess I must have had a higher tolerance for it when I was actually living there
@Szabolcs Sure, go ahead. I don't want to hold you back without giving a strict time frame. Once I have something ready, you'll always be able to switch if you would prefer my solution. I work with Albert Retey.
@Mr.Wizard This is actually very interesting, since for that one your faster solution is an order of magnitude faster. I get 6.88 s for minimal, 0.86 s for minimalFast, 1.40 s for getMinSubsets, and 5.97 s for Daniel's bclMinima, so your latest function is a winner again.
Apparently, Faysal's references post is the most edited post (by a single author) across all SE sites... Shog mentioned it wrt some unrelated drama in Mathematics.
@Rojo Ah, I'm doing my best. I think my function is going to be hard to beat for general data (meaning that the subsets do not have to be integers or reals). :-)
When I execute Foobar[] and move a slider, the variable grad is printed twice. Why is this? How can I make the Manipulate only execute once on each update?
Foobar[] := Module[{f, vars, grad},
f = a x^3 - b x^2 + c y^2;
vars = {a, b, c};
With[{fman = f, controls = Apply[Sequence, {{#, 0}...
I apologize if this is a obvious question and answer, I don't often use Mathematica to display plots or graphics in general to be honest. So, I was tutoring my cousin yesterday in relation to Polar functions and decided to bring up Mathematica to illustrate some of the ideas we were discussing. ...
I have seen all these beautiful ideas dedicated to the logo and decided to add another one. And though it maybe already too late I still would like to post it – just to share and add to the pool of creative approaches. My train of thought was the following. Indeed Mathematica graphics is stunning...
I don't think PerformanceGoal -> "Quality" is the answer though as there are no plots here. It shouldn't be different from, say, Manipulate[Print[x], {x, 0, 1}], which prints only once. I suspect it's due to his construction, but I don't have time to look at it right now
@R.M Oh, I just added you to that google doc because I already had your address and it was easy. I was just wondering if you were working on any posts :)
@Szabolcs that's a good idea... it was annoying that day when I was fiddling around that I couldn't see the history. I couldn't even go back to see what combination worked with those $ signs
@Mr.Wizard Yeah, some explanation on why the doubling happens would be nice. PerformanceGoal was what I jumped to too, but it doesn't work and I couldn't explain the difference between his code and my simple example above
@R.M I updated my answer. Please take a look at it and tell me if it at least appears to be correct. I can add an explanation if it is in fact working.
@Szabolcs Sure. I was working on Mathematica GitHub client as a part of it, but stopped and switched to other things. But GitHub client will surely be a part of that.
My hunch is that going to the lawyers was a bad idea. The community members and employees would've never alerted them and they would've never known. But I guess Jin and SE need to play it safe...
@R.M Yes, better now than having the trouble later but at this point we should have taken a big Z as logo or whatever the logorian complement to the M-Logo is.
Hi all, I choose Heike's answer as the accepted answer, not because all the other very brilliant pieces of code aren't good, but because this is the one I am sure I fully understand. When I'm optimizing my program later on I will be returning to the other solutions to squeeze out extra seconds. Thanks for some incredibly answers, all of you! — MrDas25 mins ago
Is there an official time for the official launch or will the new design pop into existance at some time. Just want to know to get the champagne bottle cold.
@Mr.Wizard Actually, I don't understand that person (MrDas). He clearly stated that speed was important, and he suggested list sizes for which even your solution would have to run for quite a bit. It was clear from multiple comments that Heike's solution has quadratic complexity, so has no chance to finish lists of the size he mentioned in reasonable time.
@Mr.Wizard I would understand him (since Heike's solution is indeed the simplest and elegant) if he did not mention the list sizes. And he talks about microseconds... this is beyond me. But, this is the beginning of something I was expecting, alas.
I think Leonid is a little too pessimistic :) True, we'll have low quality stuff as we get bigger, but I'd give MrDas a break... At least, he was honest about his reasoning and quite frankly, that is not all that unreasonable. After all, an accepted answer is supposed to indicate what the OP liked and found useful. Perhaps the few seconds difference didn't matter as much as others thought it would... I've seen worse, including but not limited to "You have more rep than X, so I'm accepting X's"
I see questions on TeX - LaTeX all the time, where the accepted answer is exactly what I use in my latex documents and then a highly upvoted answer below that says "Don't use the accepted answer", followed by something insanely complex that I can't follow... and I'm not bad at tex. Most likely, the experts have different priorities than the masses, yet both approaches are fine for their respective levels of understanding
@LeonidShifrin In fairness I read his question again and I'm pretty sure he means his total number of subsets is ~1000 and that using his brute force approach would produce the million-length set.
@R.M also, if one wanted to argue that the overall level is dropping, this particular question would not be anywhere on the list of examples. the question is clear, it has lots of interesting answers, he accepted an answer and even explained his reasoning
@R.M yes I also sympathize with that. not everybody has the ability, need, inclination and/or time to use the best possible approach to every little detail (and just because something is trivial for person L, it does not mean it's equally trivial for person A :) )
on the other hand it is of course useful to have more detailed/elaborate/faster answers available, since often others will find the useful. there's also the educational aspect of seeing code that you'd be unable easily to understand; it forces you to put in the effort to understand it, improving your skills in the process (if you don't ignore it).
I agree, and MrDas also acknowledged that while some of the answers are beyond his level, he'll return to it when he needs that little bit extra, so I think he recognizes the value in Mr.W's and Leonid's answers.
@R.M I'm not upset with the OP for selecting a different answer. That's his prerogative. I would however argue that the first version of my method is actually quite understandable after a bit of thought and moderate familiarity with Mathematica, apart from the trick I learned from Simon Woods. (Incidentally a trick a had to abandon in minimalFast.)
@Mr.Wizard Oh no, I wasn't saying about you or the accept... just disputing the notion that this is in some way, a symptom of popularity and a sign of our impending doom
very good, I spent several days developing and debugging some code for calculating berry band structures, berry phases and so on for simple tight-binding noninteracting models, and discover there is publicly available code for this in python
I have a differential system like
dx/dt = A x(t) + B y(t)
dy/dt = C x(t) + D y(t)
where A, B, C, and D are real constants. Now I need to explore the behavior of the system if A, instead of being a constant number, is a random number uniformly distributed between a given range. I just need to c...
When I execute Foobar[] and move a slider, the variable grad is printed twice. Why is this? How can I make the Manipulate only execute once on each update?
Foobar[] := Module[{f, vars, grad},
f = a x^3 - b x^2 + c y^2;
vars = {a, b, c};
With[{fman = f, controls = Apply[Sequence, {{#, 0}...
