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Confusion between factor levels and factor labels

There seems to be a difference between levels and labels of a factor in R. Up to now, I always thought that levels were the 'real' name of factor levels, and labels were the names used for output (such as tables and plots). Obviously, this is not the case, as the following example shows: ...
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Meaning of -

I am new to XML and I am trying to understand the basics. I read the line below in "Learning XML", but it is still not clear, for me. Can someone point me to a book or website which explains these basics clearly? ...
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Forgot “git rebase --continue” and did “git commit”. How to fix?

...rebasing code in git, I got some merge conflicts. I resolved the conflicts and did: 4 Answers ...
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How to render a DateTime in a specific format in ASP.NET MVC 3?

... iterating an IEnumerable<T>. Creating a template is simple enough, and can provide a lot of flexibility too. Create a folder in your views folder for the current controller (or shared views folder) called DisplayTemplates. Inside that folder, add a partial view with the model type you want...
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Does a javascript if statement with multiple conditions test all of them?

...IT: Though, you shouldn't worry about performance until you've benchmarked and determined that it's a problem. Premature micro-optimization is the bane of maintainability. share | improve this answe...
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ALTER TABLE without locking the table?

... And have a thorough test plan before swapping. If it fails, start over. – dkretz Jan 21 '09 at 2:29 2 ...
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How can I unit test Arduino code?

...Sim-based tests There's a lot of discussion about what unit test means and I'm not really trying to make an argument about that here. This post is not telling you to avoid all practical testing on your ultimate target hardware. I am trying to make a point about optimizing your developmen...
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How do I convert an integer to binary in JavaScript?

...nswered Apr 22 '13 at 19:43 fernandosaviofernandosavio 6,82233 gold badges2020 silver badges3232 bronze badges ...
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Position Relative vs Absolute?

What is the difference between position: relative and position: absolute in CSS? And when should you use them? 10 Answe...
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How to commit a change with both “message” and “description” from the command line? [duplicate]

I'm new to both git and GitHub. I managed to set up everything locally on my Mac, so that now I can push commits to GitHub via git (on the command line, not the Mac app). ...