@belisarius that's a nice spiral but some of the related videos seem very strange. On the plus side, my pineal gland is now feeling very activated, my codons unlocked, and my chakras healed.
@acl "ParallelOptions" -> "ParallelThreadNumber" -> 1 controls things in the kernel that have been manually threaded or maybe use OpenMP; the MKL threading is controlled using a separate option, MKLThreads. That should work but if you're left in any doubt, just set the processor affinity on the kernel to only give it one CPU. Then, when the first threaded function is called, the threading library should see the situation and figure out that it shouldn't spawn extra worker threads.
@JM I realized that. I thought it was his doing, at first, but I wanted to point out that his "answer" was used verbatim in his new "question." And, yes the quotes are deliberate.
@Szabolcs no I mean, if I have the points and wish to order them so that connecting them with lines creates an outline of the shape, this is not so easy
I have written something which works by taking a point then iteratively selecting the one closest, removing it from the list and repeating, but it breaks sometimes. and I didn't yet have time to fix it
@JM Last I checked, I couldn't delete answers, at least non-negative voted ones. That said, you had made the change, and I was trying to point out that it may not have been wholly correct.
@Szabolcs the data points I have take some time to calculate (they are energy spectra, more or less) and I do not want to run even more jobs on the cluster at the moment to produce the data set (we only have 40 mma licenses, I don't want to prevent others from working...)
@JM 4k, yet that requires an answer to have a negative score. That one was at 0 when I looked at it ... and I never thought to downvote it myself. I am not used to having this much power. :P
@Szabolcs there's no 10k privileges on beta, at 4k you get them all, including immediate delete for negative answers. All powers, except of course the super-special super-secret mod powers.
@JM with you mod-powers, do you need a cape, like super-man? Speaking of which, why don't the 4k (trusted users) get capes?
Posting as an answer per request. See
http://forums.wolfram.com/mathgroup/archive/2011/Mar/msg00529.html
Caveat: It's been almost a year since I've toyed with that code. Strange things can happen to code left on the dusty shelves of Usenet. The basic idea was similar to Leonid's: use some proxi...
That comment you made in one of the questions prompted me to dig up some of my old code. I do remember successfully reproducing the behavior of old Plot[] and ParametricPlot[].
But comparing the results of my old code with the current implementation seems to show that the current implementation evaluates at way more points...
too localized question and possibly unhelpful answer... looks like the code works for most people and he just had an issue with existing variables in his session
@rcollyer I've seen worse. I remember one post where the OP wrote expressions like array[[i, j]] as lst[[i]][[j]]. Unfortunately, his arrays went quite deep
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What's the point on Factorial returning Overflow[] or not for big machine integers but returning unevaluated for big integers? (Developer`$MaxMachineInteger+1)!
Incidentally, replacing Developer`FromPackedArray::punpack1 with "Packing" works. So, it seems if "Packing" is not On to begin with, Quiet does not have the ability to turn it on. In other words, the third argument can't change the global values which seems less then useful.
@Rojo I've found that there are some things that just can't be overridden. Either their using an undocumented/low-level function which is unblockable, or Quiet has holes in what it can block.
@RM it's soon bedtime for me (very late here), but I didn't forget about your comment on the stylesheet question. Also, that answer was meant to complement yours (which I of course +1'd).
@Szabolcs I remember you (or maybe someone else) discuss something about the automatic (* :: Package :: *) style comments that are generated... do you know how to specify package name, author name, version name etc.
@Szabolcs Oh, I was genuinely curious, didn't mean for you to delete it or anything. If there's a way to get the definitions into the stylesheet by altering the global options and without editing the cell contents, I haven't found it yet and your answer seemed to imply that... it would've made life a lot simpler
@RM I misunderstood stylesheets a bit, so it's not as trivial to get it into the stylesheet as I thought, I'll try to update the post tomorrow
"You can only perform 6 searches within a 60 second window, please wait a moment and try again." BAH! SE, make your search function better, then I won't repeat searches!
I noticed that all of the packages that come with Mathematica start with a header that is in a standard format. (See e.g. the header of NIntegrateUtilities` at the end.)
There are several commented sections, each starting with a word surrounded by colons.
Question: What is the purpose of thes...
ah, that's about reading them, not generating them... Maybe possible, maybe not:
> One fact which I find indicative is that new packages auto-generated with WorkBench do not contain these headers (may be this is just a setting which is switched off by default, I did not dig into this particular issue deep enough).
I blame Sage and their dirty playing ... I have the impression that instead of just trying to make a good system, some of the people from that project were directly attacking other projects, and trying to hinder them, creating a bad atmosphere.
Meh, it's ok... the whole open source vs. closed is always contentious, and best to walk away from it. Besides, the most popular ad has only brought in 500ish clicks in 6 months, so it's not like we expect to get people in large numbers.
@RM sometimes I wonder how some people find time to worry about whether their tools are open or not
@Szabolcs so actually, what was the consensus in the end? I could put a badge on my site, but I dislike all three: the spiky thing, its colours and the fonts (I mean no insult to whoever designed this, I just don't like it on my site). so what to do?
There was the idea that closed source is inherently incompatible with peer reviewed science, which makes some sense in certain circumstances (depending on what sorts of tools are used), but others took it as far as suggesting that results produced with closed source "are not as good" or "not as trustable". Which to me is nonsense: all software is buggy and you must verify your results, not claim that "it was made with something open source, verify the program yourself if you have doubts".
@acl That was only for the ad, not for the site design. You're welcome to post a new design in the site design thread if you like (it would be great!), and also in the ad thread. It's so easy to change the ad to a new design if anyone makes one, I though that there was no reason to delay using it more
whuber actually suggested rotating designs
This badge: I just made it for fun for my profile here
@Szabolcs but that's silly. outside books, results are believed because they're reproduced by different approaches, not because they are thoroughly checked
You hold the hands of those that can be held. People who dump 100 lines of code with barely a sentence of coherent text will never improve. They've probably been rejected from other fora as well.
I want to know how to make Mathematica to automatically convert between forms of representation of linear operators: algebraic expression and formal power series expression.
Examples:
$f(ax)\rightarrow a^{x D}$
$f(a+x)\rightarrow e^{a D}$
$\int_x^{x+1} f(t)\,dt\rightarrow {e^D - 1 \over D} $
...
That was confusing... To me, that made no sense at all (until whuber shed some light), but I didn't vote to close then because it seemed like whuber and azdahak understood or at least, knew what he was talking about and I didn't want to jump on it for lack of domain knowledge
I'm for closing it now. It's been a while and the OP has not shown a willingness to explain it better
@RM Well, now it seems more concrete: he has examples of input and output, but I still don't understand if he simply wants a few cases hard-coded or some way to go from one form to the other
You love your site and we love your site, but there is a whole world of people out there who might not even know it exists. When they do find it, their first impression will either scare them away or keep them around. Given this, let's take a hard look at the questions and answers here and make s...
@acl he wants something a lot more than hardcoded stuff... he wants to be able to "magically" find these transformations.
How can it help to find the formal power series representation of operators? For example, I want to get formal power series expression for $\sum_0^{x-1} f(x)$, $f(x)*g(x)$ (*-convolution), $f(\sin(x))$. How I can get the formal expression for these linear operators? — Anixxyesterday
@RM very apropos. so, what precisely is being determined via our votes? what happens after the voting is done? who does whatever it is that gets done about it?
@acl I presume they probably file it away until they wake up from their slumber and decide whether or not to graduate us... I guess we're supposed to be critical of it and see if the answers provided are good, and if so upvote and if answers from other sources (via Google etc) are better, downvote. So it provides a "rough measure" of how much of a canonical resource this site is
going by the fact that the who's who in the professional mma world and other regulars from MG and SO are here, I'd say the chances are pretty darn high.
The product page for Mathematica Home Edition says:
Mathematica Home Edition is intended for hobbyists and enthusiasts alike, for non-professional use. If you wish to integrate Mathematica in your work, teaching, or research, other licensing options are available.
but I cannot find there n...
Not very hard... I mean, from experience, I know right away that there's no way you can google most of them. I'm not really googling them, but rather looking through the answers and usefulness of the question
As for the question you linked to, the first hit is actually this question from Super User...
@RM looks good, but the accepted answer has a comment to the effect that the kernel is only 32 bit. that doesn't seem to be true on my machine, and Heike sees the same
(my point is, this is confusing, even if things look definitive; this tends not to happen here)
but yes googling most of these would be a waste of time, which I suppose is part of the reason that attracted all of us to SO and then here
hmm... I am trying to make a 3d plot and somehow extract and set the ViewPoint etc in real time, while manipulating it with the cursor. I seem to remember something like that but can't find it. any ideas?
@Heike you probably have a stricter definition of "get" then.
If I try to think about the details of whats, I also don't understand Manipulate. But I just type out what seems reasonable and it does its job for the simple things I use it for
DynamicModule I don't understand even at that level
I use DynamicModule pretty much in the same way that I use Module, except that I use DynamicModule when Dynamic parameters are involved and Module otherwise.
@Heike OK I changed DynamicModule in the first example in the docs to Module and copied the output, and now I see the difference. No clue how I'd use this or, more importantly, how it fits into my picture of mathematica programming concepts and techniques
@Heike yes. I read it once and understood it, or so I thought. guess I'll do it one of these days, (I need a way to spend my copious amounts of free time :) )
@Rojo I would probably put all points in a large list and maintain two lists of indices. Radio buttons would work to indicate which list you're adding points to.
Thanks Leonid. I have been busy writing Mathematica demos for the last few months. I finished 7 new demos, there are numbers 25-31 in this table here: 12000.org/my_notes/mma_demos/KERNEL/KERNEL.htm (send copies of these to WRI demonstrations project also). Whenever I finish one, I get new idea for a new one. Took 7 months to do these 7. The more I use Mathematica, the more I find how little I know about it :) — Nasser M. AbbasiApr 17 at 23:12
Posting as an answer per request. See
http://forums.wolfram.com/mathgroup/archive/2011/Mar/msg00529.html
Caveat: It's been almost a year since I've toyed with that code. Strange things can happen to code left on the dusty shelves of Usenet. The basic idea was similar to Leonid's: use some proxi...
I noticed that all of the packages that come with Mathematica start with a header that is in a standard format. (See e.g. the header of NIntegrateUtilities` at the end.)
There are several commented sections, each starting with a word surrounded by colons.
Question: What is the purpose of thes...
I want to know how to make Mathematica to automatically convert between forms of representation of linear operators: algebraic expression and formal power series expression.
Examples:
$f(ax)\rightarrow a^{x D}$
$f(a+x)\rightarrow e^{a D}$
$\int_x^{x+1} f(t)\,dt\rightarrow {e^D - 1 \over D} $
...
The product page for Mathematica Home Edition says:
Mathematica Home Edition is intended for hobbyists and enthusiasts alike, for non-professional use. If you wish to integrate Mathematica in your work, teaching, or research, other licensing options are available.
but I cannot find there n...
