8.50.2 Greatest hits from previous weeks

8.50.2.1 How to influence the position of float environments like figure and table in LaTeX?
8.50.2.2 How to add an empty line between paragraphs?
8.50.2.3 How to write partial differential equation (Ex. dQ/dt=ds/dt) with real partial derivative signs?
8.50.2.4 How do I put text over symbols?
8.50.2.5 Show equation number only once in align environment
8.50.2.6 How can I get bold math symbols?
8.50.2.7 What can I use to typeset MATLAB code in my document?
8.50.2.1 How to influence the position of float environments like figure and table in LaTeX?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=39017

How to influence the position of float environments like figure and table in LaTeX? 
This is a general question and should collect useful answers for all users. I hope we can use this as a reference 
[floats] [positioning]
 
asked by Marco Daniel https://tex.stackexchange.com/landing/r/digest?cta=user&id=5239 Score of 695
answered by Frank Mittelbach https://tex.stackexchange.com/landing/r/digest?cta=user&id=10109 Score of 1000
8.50.2.2 How to add an empty line between paragraphs?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=135134

I have two sections which I'd like to separate by an empty line. Every time I press Enter, LyX removes that empty line between paragraphs. How do I prevent this? 
[spacing] [lyx]
 
asked by goldisfine https://tex.stackexchange.com/landing/r/digest?cta=user&id=37301 Score of 145
answered by Werner https://tex.stackexchange.com/landing/r/digest?cta=user&id=5764 Score of 159
8.50.2.3 How to write partial differential equation (Ex. dQ/dt=ds/dt) with real partial derivative signs?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=225523

I would like to make a partial differential equation by using the following notation: 
dQ/dt 
(without / but with a real numerator and denomenator). Earlier today I got help from this page on how to ... 
[equations]
 
asked by David https://tex.stackexchange.com/landing/r/digest?cta=user&id=71265 Score of 126
answered by Sebastiano https://tex.stackexchange.com/landing/r/digest?cta=user&id=117876 Score of 9
8.50.2.4 How do I put text over symbols?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=74125

This is difficult for me to explain, but how do I put words over a symbol? For instance, I want to add words over an equal sign. Anyone know the command/syntax for that? 
Also adding ^ doesn't cut it..... 
[syntax]
 
asked by Lemon https://tex.stackexchange.com/landing/r/digest?cta=user&id=10554 Score of 142
8.50.2.5 Show equation number only once in align environment

https://tex.stackexchange.com/landing/r/digest?cta=question&id=17528

I want the equation number to be shown only at the last line, or better, somewhere in the middle of all. So instead of (1), (2), ... only (1). 
I use \begin{align} ... \end{align} 
[equations] [align]
 
asked by Theta30 https://tex.stackexchange.com/landing/r/digest?cta=user&id=5350 Score of 243
answered by Gonzalo Medina https://tex.stackexchange.com/landing/r/digest?cta=user&id=3954 Score of 228
8.50.2.6 How can I get bold math symbols?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=595

To make Latin-letter variables bold I can use e.g. \mathbf{a}, but while putting Greek letters or symbols such as \nabla inside \mathbf doesn't cause any errors or warnings, it also doesn't do ... 
[fonts] [math-mode] [symbols] [bold]
 
asked by Michael Underwood https://tex.stackexchange.com/landing/r/digest?cta=user&id=32 Score of 577
answered by Mark Meckes https://tex.stackexchange.com/landing/r/digest?cta=user&id=206 Score of 482
8.50.2.7 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 118
answered by Vivi https://tex.stackexchange.com/landing/r/digest?cta=user&id=14 Score of 94