## Top new questions this week:

### Do fontsize environments exist?

Without any doubt there are fontsize switches in the form of control sequences (described here for instance.) But, from time to time I ran into code examples where environment versions of those were ...

{macros} {environments} {latex-kernel}

### is there a way to write −= as one symbol in formulas

In programming -=, += and other similar operators are quite popular. But I am unable to write such operator nicely in Latex equations. For example when I use x += \frac{\partial C}{\partial x} I get ...

{math-operators} {relation-symbols}

### Tikz-diagram: Additional right angle and space

I'm trying to recreate this diagram: Mine already looks pretty good but the connection between the Environment and Sensornode lacks the 2nd right angle and space for the measured by text. How ...

{tikz-pgf} {diagrams} {tikz-arrows}

### why lualatex gives erorr "Too many open files" but pdflatex does not on same latex file?

Using TL 2015 on Linux. I have a latex file which includes graphics, all in pdf format. All the images are included using the call ...

{errors} {luatex} {memory}

### Matrices in latex

Trying to create a matrix using the below markup: \begin{figure} \centering \[ \begin{blockarray}{cccccccc} I & like & nlp & mlpr & enjoy & reading & books \\ ...

{matrices} {arrays}

### Is it possible to define a dotted version of \vrule?

The \vrule primitive has a nice charcateristic: it has the ability of adapting itself to the height and depth of the enclosing box: \documentclass{article} ...

{tex-core} {rules}

### tikz-3dplot: Rotate arc around specific axis

\documentclass[tikz]{standalone} \usepackage{tikz-3dplot} \begin{document} \begin{tikzpicture}[scale=2] % draw arcs \draw[canvas is zx plane at y = 1, line width = 1pt] ...

{tikz-pgf} {rotating} {tikz-3dplot}

## Greatest hits from previous weeks:

### Is there any way to do a correct word count of a LaTeX document?

Often assignments (or even papers) have a word count limit. That is not a big deal when using Word, but I don't know how to do that using LaTeX. My solution has been so far to compile the document and ...

{packages} {compiling} {word-count} {scripts}

### What are the available "documentclass" types and their uses?

Some of the available classes of documents in LaTeX are well known and widely used, such as the article and beamer classes, while others are not so well known, such as the standalone class. I found ...

{document-classes} {big-list}

### Invalid page tree PDF

I have a generated LaTeX (python scripts, getting data from different sources) document which is then compiled into a pdf with pdfLaTeX. Generally the structure of the document is the following ...

{hyperref} {pdftex} {pdf} {debugging}

### How can I synchronize page-breaking text across columns?

I'm trying to produce something like this: I've been using memoir. Here's an idea I had. My understanding is that \footnote creates a float that tries to place itself at the bottom of the nearest ...

{horizontal-alignment} {cross-referencing} {page-breaking} {memoir} {columns}