@acl Have you tried increasing the number of MKLThreads via SetSystemOptions["MKLThreads" -> ...]? It may help if you have the cores available. Default on my machine is 2.
@rcollyer no, I haven't. I doubt the bottleneck is that, but it's worth trying tomorrow (I have lots and lots of cores available... it's brain cells that are the problem)
thanks
yes it's two on my laptop too; so that's why it uses 2 cores. great!
@rcollyer aye, that it is, also for other projects. halving the time something needs to finish is important even if it's from 1 minute to 30 secs, because 30 secs is semi-interactive--1min and I'm reading SE...
1min is not long enough to do something else, but too long to stare at a screen doing nothing
@rcollyer not worth it, I could probably kill it with more computing power faster than that. and it needs manual intervention (I don't know the interesting parameter ranges yet). but thanks
I was reading some papers from the 80s today during a talk; they displayed some plots. to check if I understood, I wrote the code and produced the talks, inside a manipulate, during the talk! all this on a macbook air
Sometimes it takes more resources than you have to make that realization. The problem some of my code faces: 50+ GB RAM required if I don't rewrite to a more memory friendly/slower method.
Well, the design on my part is deliberate. The particular motherboard has 3 (possibly, 4) gigabit ports, so I could directly connect them to the other machines without having to run them through a router/switch.
Although, apparently the newer version is faulty ... back to the drawing board.
well I try to avoid relying on computers more than mma. They are good for a specific kind of problems, and I am interested mainly in a different kind of problem
yeah, well, my calculations require me to throw as much power at them as possible to get everything done. Of course, I will have performed about 1000 of them for the thesis.
Lots and lots of computer time, and I didn't write the code.
@rcollyer this works if you have a well-defined but hard problem. but at that point I tend to lose interest, I'm more interested in the defining-the-problem phase, unfortunately
@acl it is some of the worst code I've read, and it has put me off Fortran as a viable language completely. There are at least 5 versions of Simpson's rule integration spread throughout the code!
@rcollyer I hate debugging anything. it would be nice if it all worked like my pencil and paper calculations, with factors of 2 and pi reinstating themselves as necessary
however, as a mathematician friend once put it when he saw my pages of calculations with nary a $\pi$ in sight, "let's hope you never try to put a man on the moon" :)
@belisarius I've never actually done it. But, there's this experimental paper I wish to compare my calculations to and they're in cgs. Basically, I'm screwed.
@belisarius One of my favorite HW assignments came from that class: determine the energy lost due to gravity of a shaken fist. All sorts of approximations came into play there because they didn't matter. It was fun.
@rcollyer but those 2 volumes (of M&F) were written in a different era. there was no mma then. you either did it that way or gave up. nowadays, knowing this stuff is useless, if intimidating to your colleagues
@acl There was this assignment in E&M that was just a brutal mishmash of trig identities. I learned I can hold about 15 sub-expressions in my head at once, while simplifying them, that day. Scared the hell out of a fellow student.
and that's my only claim to fame with regards to that.
Since the early 1990s, young male elephants in Pilanesberg National Park and the Hluhluwe-Umfolozi Game Reserve in South Africa have been raping and killing rhinoceroses
@belisarius I feel like there was too, but not finding it yet. They are refusing to print unless I "Print as Image". This would cause far too many glitches for our production process.
@belisarius if I'm an elephant transportation to the zoo will require a lot of coordination and money. Are you footing the bill? Or, are you just going to duck any responsibility?
@Verbeia does printing not work correctly if you rasterize? in my case I get glitches if I print without rasterizing, not if I do rasterize (same for PDFs)
@belisarius That's part of the issue, but I am finding that they are just refusing to print at all. I haven't posed it as a question on the site because (a) I'm using a custom package that changes almost every default in the graphic and (b) it could be the printer driver, and therefore "Too Localised".
@belisarius No, and the default graph doesn't work on a different printer either. Nothing to do with Arial as the font, either. A bog-standard DateListPlot fails.
@belisarius I understand. apparently, though, someone was drinking while experimenting and saw a jump in superconducting temp when they spilled the wine on their sample.
@@F'x I can't upload to anywhere from work, but I will try later when I get home. I've got the files. So does @MikeHoneychurch, since I have his email address.
@Fx no, I haven't looked at cp2k; I haven't had the need to use it. I think any language can be written poorly, and made more difficult to debug. For instance, have you used any of the template functionality in c++? If you haven't the error messages can literally be pages long per message.
in this analogy, I suppose Mathematica would be like a rocket dragster: 99% of the time you amaze friends with your masterpieces, but the 1% remaining involves you spectacularly exploding
@Fx And the goal is to either whittle away at that 1% so it explodes less, or wrap your self in enough protective gear, that when it does explode (and it will) your well padded.
does anyone know of a command line or visual diff file viewer (for '.nb' files) for MMA? From some google searches, it appears that the '.m' files are amenable (I guess they're plain text?) while '.nb' files would probably need MMA itself.
@tkott Notebooks are ultimately just text files. However, they do store meta-data in a file outline cache which would not yield anything good with a diff file viewer. That said, if you turned it off, it should work. As an alternative, there's workbench which may include some sort of diff mechanism as it is built on top of Eclipse.
In Stephen Wolfram’s recent blog post about personal analytics, he showed a number of plots generated by analyzing his archive of personal data. One of the most common pieces of feedback we received was that people wanted to know how they could perform the same kind of analysis on their own data. So in this [...]
@rcollyer Hmm, i forgot about workbench. I think I have access to that too. I'll check it out. I tried doing a diff using a text parser, but with figures and such, there was a LOT of noise. That's why I was thinking MMA itself might be better...
@acl I've expressed my thoughts pretty clearly in some comments, and was apparently not alone to think as such. There's no way their site can get better before there is an active mod team, which seems dormant, to say the least.
I'll want to read his original paper someday, when I finally decide to do it.
@Heike just ignore it if it annoys you (I was told in a different discussion under that question that it is not true that Re[f[z]] is not differentiable; discuss)
My take on the question was that the OP wanted to just extract whatever equation is there that involves his variable x so that he can, say, plot it or something
