I just went to wolfram.com, read about the tech conference, and something about a one liner competitoin, clicked, got a notebook with the first 3 places of last year, and a stupid idea came to mind that I'm checking out
Just messing with controlling the window opacity with the webcam brightness. For example, to do a "reflective screen", with something like CreateDialog[{}, WindowSize -> Full, Background -> Black, "WindowOpacity" -> Dynamic@(1. - Mean@Flatten@ImageData@CurrentImage[])]
Have been around Mma SE for a while, but still a newbee. I need to learn how to ensure the Mathematica code in my posts is properly formatted. Can somebody explain how to do that before I earn my self a "nuisance badge".
@TedErsek, I am no stackexchanged and I was new in here a few months ago. i still get some edits but noone barked at me too much. What I do is, before posting, I see the formatted verision of the post, and try to copy paste and run all code I'm putting in the post
@R.M. Well I am working on learning this stuff, so stop harpping about how I need to get better. I would have learned sooner, but I can't find a lot of time for SE.
@VitaliyKaurov First I thought that the dots are nodes and they're connected in the graph if they're connected in the image. This is not really doable though.
People seem to ask programming related question of main site. Can I ask following type of question in here?
I have this local debug window that is so annoying
How can i hide it? What is the purpose of it?
@Szabolcs Okay, could you check if Import["ftp://math.nist.gov/pub/MatrixMarket2/Harwell-Boeing/chemwest/west0479.rua.gz"] is working on your Linux installation?
It works on the Windows machine I am looking at, but not on my *nix box.
@JM I'll check later on Linux, but for now I can say it doesn't work on this Windows machine. It complains that it cannot find a file in the local temp directory (probably the downloaded file). What error do you get?
Anyway, I was trying to grab a few test matrices from ExampleData["Matrix"] when I saw a number of $Failed entries in my output... some tracing showed that it was trying to import from a few FTP sites.
Apart from the debugger in the Workbench there's also a debugger built-in in Mathematica. You can find it in the Evaluation menu. It is not well documented and rather difficult/unconventional to get it to work. Here is a step-by-step instruction how to use it:
Assuming you have the debugger swit...
Very naive question: travel.stackexchange.com/questions/7663/… Lumping "Europe" together. At least not as bad as talking about the "Western World", and lumping everything together that is not e.g. Chinese
Wouldn’t it be cool if you never had to remember another password again? I read an article in The New York Times recently about using individual typing styles to identify people. A computer could authenticate you based on how you type your user name without ever requiring you to type a password. To continue our [...]
@JM It's a CDF that measures the time between the consecutive letters as you type them. I'm curious if the distribution is really specific to a person. The screenshots on the site have a long time for f-r while that's the shortest interval in mine
For `DSolve[{y''[x] - 2 (y[x])^2 - y[x] == 0, y[0] == 0, y'[0] == 10^-4}, y[x], x]` I am getting `DSolve::bvimp: General solution contains implicit solutions. In the boundary value problem these solutions will be ignored, so some of the solutions will be lost. >>` and output = {} what does that mean??
That's a loaded question. There are several ways. For something like x^2, I'd consider using ReplaceAll (or its shorthand /.), like x^2 /. 2. To create a callable function, though, I'd write f[x_]:=x^2, then f[2] gives you what you want. For some extra info, I'd read this question.
You're welcome. We've all been there. Glad I could help.
Incidentally, in the last integrations I did, the simplification steps are a little non-standard. Specifically, I ran it through once, didn't like what I got (in form) and fed only the first two terms into Simplify and added third.
@Mr.Wizard How did you modify the way your user name is displayed at the end of a comment? I have in mind the one where you reversed the order of letters in your user name.
Okay--copy and paste my last line into something, and you'll notice that if you type after the word "test", it'll append the chars in a funny place. But remember, with great power comes great responsibility.
To bring this back on topic, it appears that when I paste the right-to-left override character into a Mathematica notebook, the character is there, but doesn't cause an RTL mode change.
Quick question for everybody: most of the curated data functions support something like CityData[All, "Preload"] if you want all the data loaded up on your system in advance. How do you do this for ExampleData[]?
Well, the simplest would be to run ExampleData /@ ExampleData["Matrix"]; once. It saves the downloaded data to $UserBaseDirectory/Paclets/Repository/ExampleData_Matrix-6.0.2/Data
FWIW, I get errors with some of the matrices, so might not necessarily be due to linux (I'm on a mac)
People seem to ask programming related question of main site. Can I ask following type of question in here?
I have this local debug window that is so annoying
How can i hide it? What is the purpose of it?
