10.68.2 Greatest hits from previous weeks

10.68.2.1 How do you get \mathbb 1  to work (characteristic function of a set)?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=26637

I am trying to get the digit one printed the \mathbb{} font in math mode, however the command 
\mathbb{1} 
outputs some rubbish. I certainly saw the character I am after in some pdf's generated from ... 
[math-mode] [formatting]
 

asked by Grzenio https://tex.stackexchange.com/landing/r/digest?cta=user&id=3329 Score of 255

answered by Stefan Kottwitz https://tex.stackexchange.com/landing/r/digest?cta=user&id=213 Score of 282

10.68.2.2 Double line spacing

https://tex.stackexchange.com/landing/r/digest?cta=question&id=819

I would like to typeset a draft of my document with double linespacing so that my collaborators have space to write in their edits (with a pen).  How do I do it? 
[line-spacing] [setspace]
 

asked by Vebjorn Ljosa https://tex.stackexchange.com/landing/r/digest?cta=user&id=35 Score of 247

answered by Stefan Kottwitz https://tex.stackexchange.com/landing/r/digest?cta=user&id=213 Score of 181

10.68.2.3 What can I use to typeset MATLAB code in my document?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=75116

This question led to a new package: 
matlab-prettifier 
Does anybody have a quick and easy way to typeset some relatively long MATLAB code in the appendix? I looked up a few methods, and the mcode ... 
[listings] [highlighting] [matlab]
 

asked by suzu https://tex.stackexchange.com/landing/r/digest?cta=user&id=19279 Score of 120

10.68.2.4 Force figure placement in text

https://tex.stackexchange.com/landing/r/digest?cta=question&id=8625

I have a problem when a lot of figures are in question. Some figures tend to "fly around", that is, be a paragraph below, although I placed them before that paragraph. I use code: 
\begin{figure}[ht] 
\... 
[floats] [positioning] [captions]
 

asked by Marin https://tex.stackexchange.com/landing/r/digest?cta=user&id=2755 Score of 684

answered by Juan A. Navarro https://tex.stackexchange.com/landing/r/digest?cta=user&id=169 Score of 836

10.68.2.5 Absolute Value Symbols

https://tex.stackexchange.com/landing/r/digest?cta=question&id=43008

What is the "best LaTeX practices" for writing absolute value symbols?  Are there any packages which provide good methods? 
Some options include|x| and \mid x \mid, but I'm not sure which is best... 
[math-mode] [symbols]
 

asked by jamaicanworm https://tex.stackexchange.com/landing/r/digest?cta=user&id=9757 Score of 330

answered by Peter Grill https://tex.stackexchange.com/landing/r/digest?cta=user&id=4301 Score of 250

10.68.2.6 When should I use \input vs. \include?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=246

There are two different commands to incorporate another file into the source of some document, \input and \include. When should I use one or the other? What are the differences between them? Are there ... 
[include] [input]
 

asked by Phil Miller https://tex.stackexchange.com/landing/r/digest?cta=user&id=60 Score of 1513

answered by Michael Mrozek https://tex.stackexchange.com/landing/r/digest?cta=user&id=29 Score of 1404

10.68.2.7 Not equal sign (a^\211 ) with a vertical bar

https://tex.stackexchange.com/landing/r/digest?cta=question&id=108193

Is it possible to get a \neq but with a vertical bar instead of a slanted one? There are inequality operators like AMS's \gvertneqq that feature this kind of "not equal" but not without mixing it with ... 
[math-mode] [symbols] [relation-symbols]
                                                                                  

                                                                                  
 

asked by Christian https://tex.stackexchange.com/landing/r/digest?cta=user&id=13450 Score of 45