# Tag Info

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Requires xelatex: \documentclass{article} \usepackage{color} \XeTeXinterchartokenstate = 1 \newXeTeXintercharclass \vowelsclass \XeTeXcharclass \a \vowelsclass \XeTeXcharclass \e \vowelsclass \XeTeXcharclass \i \vowelsclass \XeTeXcharclass \o \vowelsclass \XeTeXcharclass \u \vowelsclass \XeTeXcharclass \A \vowelsclass \XeTeXcharclass `\E ...

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This is just for practicing with LaTeX3 code. \documentclass{article} \usepackage{xparse,xcolor} \ExplSyntaxOn \NewDocumentCommand{\colorize}{mm} { \cs_set:cpn { maryjane_color_#1: } { \textcolor{#2}{#1} } } \tl_new:N \l_maryjane_text_tl \NewDocumentCommand{\changecolors}{ O{aeiou} m } { \tl_set:Nn \l_maryjane_text_tl { #2 } \tl_map_inline:nn { #1 ...

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My first LaTeX3 answer! Yay! :) The l3clist package has a lot of built-in commands to deal with comma-separated lists. Here's an attempt: \documentclass{article} \usepackage{expl3} \usepackage{xparse} \ExplSyntaxOn \NewDocumentCommand \countItems { m } { \clist_count:N #1 } \NewDocumentCommand \countInlineItems { m } { \clist_count:n {#1} } ...

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A loop and a counter: Code \documentclass{article} \makeatletter \newcommand*{\length}[1]{% \@tempcnta\z@ \@for\@tempa:=#1\do{\advance\@tempcnta\@ne}% The length of the list #1 is \the\@tempcnta.% } \makeatother \begin{document} \length{0,1,54,1,3} \def\mylist{0,1,54,1,3} \length\mylist \end{document} Output The length of the list ...

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The difficulty is not in producing it, but rather in printing it. Here's a way; for printing ten terms we need two lines and I decided to let TeX bother with the splitting. The \telescope command is generic, by redefining \Term you can print other similar series. \documentclass{article} \usepackage{xparse,amsmath} \ExplSyntaxOn ...

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The main error is in the line \ifnum\select@i=#1\@@select@item\@endfortrue\fi% When \@@select@item the lookup for the number is not finished and TeX keeps expanding until finding something that's not a digit; when \@@select@item is 1, it's easy to predict chaos. A better style is \ifnum#1=\select@i\@@select@item\@endfortrue\fi because \select@i is a ...

11

Using \# simply defines \#. You need something that, given a name, becomes the command with that name. Such a thing exists as a TeX primitive command: \csname ... \endcsname \documentclass{article} \newcommand{\MkVec}[1]{\expandafter\def\csname#1\endcsname{\vec{#1}}} \MkVec{x}\MkVec{y} \begin{document} Some vectors: $\x$, $\y$. \end{document} If you ...

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The tricky part is to get the maximum number of pages in a PDF file. If a file is included in pdfTeX, then it sets a primitive \pdflastximagepages with the number of pages in the included PDF file. Thus the following example defines the macro \getpdfpages. It includes the first page in a temporary box. Then it sets the LaTeX counter pdfpages to the value of ...

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Here another approach using l3int: \documentclass{article} \usepackage{amsmath} \usepackage{xparse} %dt. Silbentrennung \ExplSyntaxOn \cs_generate_variant:Nn \int_set:Nn { Nx } \NewDocumentCommand \Formula { O{1} O{1} m } { \int_step_inline:nnnn { #1 }%initial value { #2 }%step { #3 - #2 }%final value { \formula_func_aux:n { ##1 } \\ ...

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\foreach strips spaces before each list item, and then collects everything up to the next comma (or the list terminating token) before assigning to the relevant variables. The \foreach problem arises in this case because of the extra space given before the closing brace in the list. Consider the following: \foreach \p/\q in {a/{1,2,3}, b/{4,5,6} } ...

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As mentioned in the comments it is more efficient to avoid \foreach and do your own tests for empty lists or list items. Also anything done within a \foreach iteration has to be done globally to last past the end of the loop. There may be packages which already provide this functionality but here is an example of what could be done. It contains a bit more ...

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Use it without a second member (which would denote the step): \documentclass{article} \usepackage{tikz}% http://ctan.org/pkg/tikz \newcommand{\boucle}[1]{\foreach \x in {1,...,#1} {\x }} \begin{document} From 1 to 5 : \boucle{5} From 1 to 2 : \boucle{2} From 1 to 1 : \boucle{1} \end{document} The same result could be achieved using multido: ...

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I'd suggest you to switch to the more versatile algorithmicx package; using the noend option, you can achieve what you want: \documentclass{article} \usepackage[noend]{algcompatible} \begin{document} \begin{algorithmic} \IF{condition} \IF{another condition} \STATE do something \STATE do something else \ELSE ...

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I suggest l3clist which provides the function \clist_item:Nn. A list starts add the indice 1. \documentclass{article} \usepackage{biblatex} \usepackage{xparse} \ExplSyntaxOn \NewDocumentCommand \select { m m } { \clist_item:nn { #2 } { #1 + 1 } } \ExplSyntaxOff \begin{document} \begin{itemize} \item \verb+\select{0}{A,B,C,D,E}+ gives ...

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To add to Dan's answer, you may do the following to avoid the repeating \MkVec{..}'s. \newcommand{\MkVec}[1]{\expandafter\def\csname#1\endcsname{\vec{#1}}} \def\lst{x,y,z,u,v,w,a,b,c} \@for\i:=\lst\do{% \expandafter\MkVec \i } Now, with this implementation, you can maintain/modify your list of related macros in a single action. Should you ...

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