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How to split data into training/testing sets using sample function

I've just started using R and I'm not sure how to incorporate my dataset with the following sample code: 23 Answers ...
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Calculate a Running Total in SQL Server

Imagine the following table (called TestTable ): 15 Answers 15 ...
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How do I detect if software keyboard is visible on Android Device or not?

Is there a way in Android to detect if the software (a.k.a. "soft") keyboard is visible on screen? 30 Answers ...
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form_for but to post to a different action

I want to have a form_for @user , but post to a custom action in the users controller. 6 Answers ...
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Common MySQL fields and their appropriate data types

I am setting up a very small MySQL database that stores, first name, last name, email and phone number and am struggling to find the 'perfect' datatype for each field. I know there is no such thing as a perfect answer, but there must be some sort of common convention for commonly used fields such as...
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How to set a Default Route (To an Area) in MVC

... no solid solution out there. So for purpose of myself and others who may find this useful. 13 Answers ...
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How do I hide an element on a click event anywhere outside of the element?

I would like to know whether this is the correct way of hiding visible elements when clicked anywhere on the page. 20 Answ...
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Android emulator-5554 offline

I'm having a problem with emulator-5554, it keeps telling me it is offline. 37 Answers ...
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How can I export tables to Excel from a webpage [closed]

How can I export tables to Excel from a webpage. I want the export to contain all the formatting and colours. 14 Answers ...
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form_for with nested resources

...a two-part question about form_for and nested resources. Let's say I'm writing a blog engine and I want to relate a comment to an article. I've defined a nested resource as follows: ...