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I am trying to generate a random sequence from a fixed number of characters that contains at least one of each character. For example having the ensemble m = letters[1:3] I would like to create a sequence of N = 10 elements that contain at least one of each m characters, like a a a a b c c c c a I tried with sample(n,N,replace=T) but in this way also a sequence like a a a a a c c c c a can be generated that does not contain b . f <- function(x, n){ sample(c(x, sample(m, n-length(x), replace=TRUE))) } f(letters[1:3], 5) # [1] "a" "c" "a" "b" "a" f(letters[1:3], 5) # [1] "a" "a" "b" "b" "c" f

I have a sample code that was built with Netbeans. It has a build.xml file so I downloaded ant and try to run it. I've got this error message: ...... nbproject\build-impl.xml:76: Platform is not correctly set up For what I can see, this is fixed by "simply" downloading Netbeans and running the sample from there, but... I don't want to install it to run a 10 files sample. Is there a workaround to run Netbeans projects with Java? What's the correct .properties file I have to modify? Mads Hansen It is possible to run the NetBeans generated projects straight from Java/ANT, but you may need to

I'm attempting to simulate the occurrence of an event (a vehicle entering a tunnel), which as it turns out is a Poisson process. I've broken the day up into 1 minute intervals, starting from 9am to 5pm. For each 1 minute interval, I've computed/obtained the mean: Number of vehicles that enter the tunnel during that period. Time between each vehicle entering the tunnel (expected interarrival time) For example for the minute 10:37-38 the mean is 5 vehicles with a mean inter-arrival time of 12seconds To sample the 10:37-38 minute I do the following: Sample a Poisson distribution with a mean of 5

So my asp.net is very very rusty, and i'm trying to get back into best practices and what not. So, I whip out google and start looking for examples and samples and tutorials, but what do I find? Old crusty stuff that tends to be written even before "the latest" technology was released back in the stone age. Sure, the concepts may still hold up. But the actual implementations are basically useless. I'm looking for something using Linq, n-layers (not tiers. Tiers can be a layer, but a layer is not necessarily a tier) some kind of current ORM (L2S, EF, etc..) and some real-world stuff, not

Are there any WPF sample applications that showoff the 'coolness' of WPF? I'm hoping to see some examples of the UI capabilities etc., and general structure and best practices. (oh, and the install shouldn't be too elaborate hehe) Family.Show is a great end-to-end reference sample ... done by Vertigo . I believe that Microsoft commissioned this sample application in order to demonstrate the power of WPF. It definitely shows off some best practices (e.g. how to skin an app, etc.). I don't know about the "coolness" factor, but Scott Hanselman has an application called Baby Smash . It's an

I want to bring the list of what apps are installed in my iPhone. I hear this code sample is in this website but I can't find it. Code Sample: Check if an app is installed - iDevKit: http://idevkit.com/forums/tutorials-code-samples-sdk/604-code-sample-check-if-app-installed.html Can anyone give me a hint or how to get that code from the website? Thanks. This is not possible on non-jailbroken iOS devices—the app sandbox prevents it. You can test for some individual applications, if you know the URL schemes they implement (e.g. tel:// for the Phone app), by calling [[UIApplication