@Rojo Yep, LD would be the algorithm to use. Still, some care is needed; you'll want to also check if your Toeplitz matrices are well-conditioned, since the fast algorithms are more likely to choke than Cholesky.
This is a spinoff of this question
Defining
$$f_0(x) = x$$
$$f_n(x) = \log(f_{(n-1)} (x)) \space (\forall n>0)$$
and
$$a_0 = 1$$
$$a_{n+1} = (n+1)^{a_n} \space (\forall n>0)$$
How to calculate
$$\lim_{n \to \infty } f_n(a_n) $$
(an "experiment" here, but (beware) I think WolframAlpha...
anyone know how to approach making a dropdown select option box in mathematica that would display text strings depending on what option you select, kind of like an html form?
Could you please clarify for me the following:I don't understand the command Directive. What is the difference between Plot[x,{x,0,1},PlotStyle-> {{Red,Dashed}}] and Plot[x,{x,0,1},PlotStyle-> Directive[Red,Dashed]]
If I look at the examples the doc gives and replace Directive[] by {} I get the same result.
@belisarius on your math post I would suggest adding in the question the first few values for n=1,2,3,4...
@DanieleRicci that will depend on the data structure in which you have the cells. to avoid reading your question and answers, could you provide a sample of how the configuration is returned? is it a list?
At the bottom of page 71, there is a question about
plotting discontinuous functions without spurious vertical segments, which is dated Dec 7, 2010. The next question, about default color data, is dated Mar 22, 2011. What happened to the intervening questions? Not worth saving? Who deleted them...
@J.M. I found the following post tpfto.wordpress.com/2012/05/04/quick-and-dirty-inversion which you might not be completely unfamiliar with. I need to do some numerical inverse laplace transform, and I was wondering i) how robust is the method in that post and ii) if you are aware of methods involving such transform over more than one variable?
The broader point I'm trying to make is that learning a new software and language that's completely alien to you (and very different from what you're used to) when you have a serious time crunch is not going to be very helpful. Instead, if you can find resources/code for what you already know, it'll be far simpler for you to improve on it.
@DanieleRicci You can count the number of ones in a binary image using the following approach: Mean@Flatten@ImageData[image] Times @@ ImageDimensions@image
@image_doctor yes, but all the way he only has a matrix. Then he creates frames from it and shows this frames. I think it's not good when someone looks at his thesis and sees that he is recovering the data from the images when he just could have used the data itself.
@image_doctor But your point is of course right. You can count how many pixel of one color you have in an image.
Yes. I must have seen a post about it, before it happened, but not noticed that the post date was a while ago. That's what "graduation" was referring to?
A few years ago. I decided to buy a copy to help myself learn more about finance (already my area, but without the proper education). I soon found myself more interested in MMa than finance.
I actually starting using every opportunity to tell everyone I knew or met about MMa.
Only to be rebuffed.
I suspect that's happened to a few of the active participants here.
@GeorgeWolfe I had a department head who favored MATLAB instead of Mathematica. I had to defend my license fiercely. I could show that I had been using it in most of my projects.
That's still an issue in quant shops, but it's diminishing. Not many people had heard of Mathematica as recently as a few years ago. Hopefully, that's changed?
@GeorgeWolfe In my current department there's no Mathematica. But many people know it and know it can do awesome things too. It's just that it's not on the IT support list. I won't get it installed on my work PC. They are not going to write an remote install script just for me.
Yes. When I was a postdoc, there were about 5k applicants for every academic neurophysiology job in the back of Science. Bad odds lead to desperate measures, I guess.
My other answer is a nice solution for interactively looking at boxes, but in the comments, Mr.Wizard seems to be indicating that he's more interested in programmatic usage, and that he's definitely interested in seeing the box form after the FE has stripped non-semantic boxes to send to the kern...
The Outline stylesheet only seems to cover 6 levels of depth. Is there any way to increase that?
Here's an example. Hitting tab on the last level just indents its content, but doesn't add another level of depth.
This is a spinoff of this question
Defining
$$f_0(x) = x$$
$$f_n(x) = \log(f_{(n-1)} (x)) \space (\forall n>0)$$
and
$$a_0 = 1$$
$$a_{n+1} = (n+1)^{a_n} \space (\forall n>0)$$
How to calculate
$$\lim_{n \to \infty } f_n(a_n) $$
(an "experiment" here, but (beware) I think WolframAlpha...
At the bottom of page 71, there is a question about
plotting discontinuous functions without spurious vertical segments, which is dated Dec 7, 2010. The next question, about default color data, is dated Mar 22, 2011. What happened to the intervening questions? Not worth saving? Who deleted them...
The Outline stylesheet only seems to cover 6 levels of depth. Is there any way to increase that?
Here's an example. Hitting tab on the last level just indents its content, but doesn't add another level of depth.
