sample

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Sampling mysql results in django

I am running django raw sql. 开发者_高级运维Lets say if it returns 250 records. I want sample the results based on the input percentage given by the user on the form (In template). How can we achieve[详细]

2023-03-06 03:26 分类：问答
Periodic function generator for Linux

In my work I need samples of mathematical functions in the form of text streams. For example,I need a program which generates values of sine function at discrete time points and prints them into stdou[详细]

2023-03-05 23:10 分类：问答
Simple loop coding issue

I am a new user of R and I have tried to write a script for similuting species invasion and community stability. I have almost finished it and I have only one tiny problem in a loop.[详细]

2023-03-04 17:20 分类：问答
R - Select rows for random sample of column values?

How can I select all of the rows for a random sample of column values? I have a dataframe that looks like this:[详细]

2023-03-04 07:22 分类：问答
Any sample project that shows how to use gamekit (server-client model) WITHOUT(!) GKPeerPickerController and more than 2 devices?

is there any sample project that shows how to use gamekit without gkpeerpicker? And is there any sample that uses bonjour (but without any internet connection and no wireless router)?[详细]

2023-03-04 05:14 分类：问答
Improve performance of "Accelerate your Widgets with OpenGL" Qt Sample?

I have been studying the Qt Quarterly article about QGraphicsScene and OpenGL for the purpose of using it in a project.I have already decided to use Qt, given its all-round excellence, but have gone d[详细]

2023-03-03 04:48 分类：问答
Opening Android samples in Eclipse

My machine Windows 7 Problem I\'m having trouble opening samples for the Android SDK. I have successfully ran a \"Hello Android\".[详细]

2023-03-01 15:17 分类：问答
MediaScannerConnection produces android.app.ServiceConnectionLeaked

I\'m using the MediaScannerConnection example code from the API Demos The snippet I\'m using is: MediaScannerConnection.scanFile([详细]

2023-02-28 06:36 分类：问答
GWT expenses demo in STS?

After hunting around a lot and trying different builds and versions of sts i still cannot get the expenses sample to run from within sts. I have managed to run it开发者_JS百科 using mvn ; but not usin[详细]

2023-02-28 05:21 分类：问答
How to execute WMLscripts and WML codes?

i\'ve downloaded the Nokia Mobile Internet Toolkit and tried to execute couple of sample WML codes but itz not 开发者_StackOverflow社区executing? Can any one guide me how to start with wml development[详细]

2023-02-27 03:09 分类：问答