{parameters} is about the meaning, and the manipulation of fundamental parameters that guide the typesetting of LaTeX.

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27
votes
6answers
1k views

Spirograph, Continuous Rotations in TikZ or PSTricks

Spirograph-like drawings are obtained when one repeatedly draws a closed curve on a continuously rotated canvas. Is there a nice way to make spirograph drawings using TikZ or PSTricks? There is a nice ...
3
votes
2answers
2k views

Length parameter for vertical skip space in a math environment?

I learned here that I can use \\[<len>] to explicitly set the vertical skip space between lines, e.g., <len> set to 3ex. I'd like to set <len> to, say, 2-times the normal length in ...
19
votes
1answer
3k views

Passing \newenvironment parameters to the end block?

I am attempting to construct a new environment which will allow me to format arbitrary list types (itemize, enumerate, description etc.) with the new environment. As such I am passing it as a ...
20
votes
3answers
3k views

Extract first & last characters of macro argument?

In LaTeX, how do I extract/isolate/determine the first and last characters of a macro argument? Specifically, in the case I'm dealing with, the argument happens to be a base-10 integer (call it N). ...
4
votes
2answers
587 views

Turning parts of text on and off

Is there a way to turn certain parts of the text on and off in LyX/Latex ? I'm thinking of having something like an environment (lets call it "TL" for "traffic light") and a parameter t such that if ...
8
votes
2answers
263 views

tikz, conditional setting of shape parameters

In my illustration I use simplified sketches of stopwatches (timers), which appear in three different "modes": (1) start of interval (coloured green), (2) time in progress (yellow), and time is ...
5
votes
1answer
421 views

Package PGF Math Error: Sorry, an internal routine of the floating point unit

This type of error (! Package PGF Math Error: Sorry, an internal routine of the floating point unit got an ill-formatted floating point number ...) arises when trying to use a predefined list for the ...
14
votes
2answers
373 views

Macro to take a character as argument, make it active, then \def it.

I have a XeLaTeX document in which I want some unicode symbols to be auto-substituted, like ¼ → 1/4, » → >>, « → <<. But instead of a long list like \catcode`\¼=\active\def¼{1/4} ...
7
votes
1answer
141 views

Using arara to compile powerdot twice

I want to compile my powerdot presentation twice -- once with, once without notes. I am trying to achieve this using arara with something like: % arara: latex { set \powerdotmode=slides here } % ...
14
votes
2answers
361 views

TeX Parameter Processing imitating key-value pairs

I am thoroughly confused by this answer to How to generate n points on a circumference and connect all of them while having constraints on the image size as I don't understand how the parameter ...
9
votes
1answer
129 views

Parameters in a caption

I have a simple figure with a code like this: \begin {figure}[htbp] \centering % \begin{tikzpicture} [scale=1] \def \r {1/4} % y-scaling % % PARAMET. \def \a {1} %x^6 \def \b {-6} ...
7
votes
1answer
338 views

Storing unexpanded macro definitions (including #1, #2, …) for later use (now includes full usecase)

Preliminary Info I'm working on a new LaTeX package to make scoping more flexible. To do this I'll be capturing and reintroducing user defined commands behind the scenes. (For a comprehensive ...
5
votes
2answers
4k views

variable-name \newcommand with parameters within another \newcommand

In "Defining a newcommand, with variable name, inside another newcommand" we learned how to use \newcommand within a command definition with another \newcommand, when the name of the inner command ...
12
votes
2answers
244 views

Passing parameters to \g@addto@macro

I'm a complete newbie but have a little background in programming. I've been looking at a MWE located here provided by Yiannis Lazarides. In the macro definition, we have %% add an image to the DB, ...
10
votes
1answer
2k views

Parameter Stack Size Error with graphicx

I'm trying to include a graphic in a document, and no matter how I try to manipulate the graphicx package, I have never been able to make an image appear. I have tried making the image PNG, PDF, and ...
5
votes
3answers
234 views

What's wrong with my newcommand?

I defined a question macro, then made it successively fancier. Right now, three macro should define a short hand for the following: \section{Questions} \begin{enumerate} \item Q1... \item Q2... ...
2
votes
2answers
52 views

Keeping underscores in parameters even inside NewEnviron environments

I followed this answer to define a command such that underscores in its parameter can be kept. However, this does not work if the command is called inside an environment that has been defined with ...
1
vote
0answers
588 views

pgfplotsinvokeforeach using parameter [closed]

The following code works in the minimal example but not in my document \documentclass{article} \usepackage{tikz} \usepackage{pgfplots} \begin{document} \pgfplotsinvokeforeach{1,2,...,10} { ...
0
votes
1answer
1k views

Start TeXstudio portable in multiple instances

I use TeXstudio portable and want to use it in multiple instances when double clicking a .tex or .txss file. The necessary starting parameter is described here, but I do not know how to use it. Do you ...