3
votes
1answer
37 views

text inside tikz node which can skip to an other

I would like to put text in a mini page with fixed length inside a tikz node using \sbox , if the text skip a specified length (10cm) it will be saved in an other \sbox and used inside a tikz node ...
5
votes
2answers
131 views

Define a New Macro via a Macro Using xparse Syntax

I am trying to set up a macro that defines a macro that is to be executed only once. With what I learned from Define a Macro via Macro if Given Macro is not defined I can do that via the ...
3
votes
1answer
41 views

Variable scoping of edef definitions in a local group (inside an ifx conditional)?

Consider this MWE: \documentclass{article} \def\testswitch#1{ \def\isA{A} \def\firstOpt{#1} \edef\tmpstr{-init-} { % start local \edef\tmpstr{-loc defined-} } % end local ...
6
votes
3answers
159 views

A reusable newlength (no stop/break if length already defined)

Often I have separate .tikz files, which may contain stuff like \newlength{\mytmplen}; and given I'm not very original with names, the same statement ends up in multiple such files. Which turns out to ...
1
vote
0answers
52 views

macro: repeat a command if new page else do nothing

QUESTION: How does one write a pair of macros that work in 1) beamer class and 2) article class, respectively, such that if it, \macroname{...}, is executed at a point in the code, that point ...
5
votes
5answers
156 views

new command with cases?

This has been answered here for text outputs with the use of \IfEqCase from the xstring package. But if I want to use the output as a value to set a parameter in a function, it fails. Here is my MWE: ...
12
votes
2answers
157 views

Why does this use of `\expandafter` not work?

I've written the following code: \newif\ifconsecutive \consecutivefalse \newcommand{\myfirst}[1]{#1\consecutivetrue\expandafter\consecutivefalse} \newcommand{\mysecond}[1]{\ifconsecutive ...
0
votes
2answers
53 views

newcommand with variable number of arguments

I have seen several related questions, but none seems to address specifically this. I would like to define a command that accepts a variable number of arguments. Something like ...
1
vote
1answer
34 views

Macros with \fi for showing and hiding proofs [duplicate]

I would like to be able to globally showing and hiding proofs on a document, and be able to use macros to open and close the proof environments. Here is my current MWE: \documentclass{article} ...
2
votes
1answer
89 views

How to get float numbers as parameter of \newcommand

I have defined a \newcommand function like into this code: \documentclass{scrartcl} \usepackage{pbox,calc} \newcounter{pointsExo} \setcounter{pointsExo}{4} \newcounter{pointsSousTotal} ...
6
votes
1answer
59 views

Conditional based on character following the macro

Basically, I would like to something like \xspace does, i.e. the meaning of the macro should depend on what is following it. So for example if I say \mymacro a it might expand to foo, and if any ...
4
votes
0answers
88 views

Conditionals—do something, if a given command is being used in the document

Is it possible to have a conditional that allow us to do something if a given command is being used in the document? For example for the \part command would be: ...
1
vote
1answer
107 views

Newcommand returning a boolean value

I'm using etoolbox. How can I create a new command that returns a boolean value? For example if I create the following command: \newcommand\ifkeyempty[1]{ \def\novalue{\pgfkeysnovalue}% ...
17
votes
2answers
361 views

Why does this simple \ifx test fail?

This should be easy, but I don't understand why the test below fails... I expected Hurrah! to be printed when the \currentchar count reaches 90 (i.e. the character code of Z). There must be some ...
9
votes
2answers
129 views

Conditionally use package and define command

I'm creating a class which should define a command if some package is available: \IfFileExists{eforms.sty}{ \usepackage[xetex]{eforms} \everyTextField{\textFont{GaramondNo8}\textSize{12}} ...
7
votes
2answers
245 views

math conditionals using (if - else - fi) command

I saw these command when i searching sth. I wonder if we can increase numbers if conditions. it's like if{0} = a, if{1}=b, if{2}=c, if{3}=d etc. \newcommand{mycommand}[1]{ \if{#1 != 0} Some text, ...
11
votes
2answers
179 views

New command with if/then statement conditioned on non-integer number?

In LaTeX, how do I declare a new command that gives different output depending no the result of a test with non-integer numbers? Specifically, I'd like to a command to compare a number with 0.01 (the ...
8
votes
1answer
82 views

Very simple condition in macros

I try to define a macro in LaTeX. This macro should give a different output when I use condition true and false. This does not work: \documentclass{article} \usepackage{lipsum} \newif\ifABC \ifABC ...
12
votes
2answers
178 views

How to test whether the starred-version of a command is defined?

This question is similar to How to conditionally define a new command in LaTeX? but I want to test if the starred version of a command is defined. The naive thing \makeatletter ...
5
votes
1answer
298 views

(x)ifthen in TikZ

I am searching for a way to conditionally handle some items in a TikZ \foreach specially using an \ifthenelse condition. However, the compiler responds ! Undefined control sequence. <argument> ...
7
votes
1answer
143 views

Macros with binary trees as arguments

I would like to have some macros which have binary trees as arguments. For the purpose of these macros, a binary tree is either root or it is {branch1}{branch2} for two binary trees branch1 and ...
5
votes
2answers
90 views

A command which produces index if optional argument is not empty

I would like to define a command which creates an index with a certain name, when i pass the name, and doesn't create any index if there is no name passed. My first idea was to write it like that: ...
22
votes
1answer
560 views

Use of \relax after \ifnum … \fi construction

I'm reading Malcolm Clark's A Plain TeX Primer. On page 111 there's an exercise to define a macro that prints the current time. I've reproduced Clark's answer below: \newcount\minleft ...
8
votes
1answer
93 views

Compare the height of arguments

I'm trying to define a \newcommand with three arguments. I'd like to: compare the height of these arguments choose the largest height to create frames (with that height) around the arguments. ...
11
votes
2answers
170 views

How to create a macro “environmentally-dependent”

Yesterday I was reading the etoolbox documentation where there are defined some new document commands such as: \Before<Begin/End>Environment{<envir>}{<code>} % ...
1
vote
0answers
26 views

Name separators, if condition for same command [duplicate]

I am new to LaTeX, just a Beginner, Basically a perl developer, I have created a .tex file \begin{document} \cont{\iname{\isurname{Name1}\ifname{K. C. G.}}\iname{\isurname{Name11}\ifname{Y. ...
6
votes
2answers
97 views

Separators for author group (IF conditon)

I am new to LaTeX, just a beginner, basically a Perl developer. I have created a LaTeX file \begin{document} \cont{\iname{\isurname{Name1}\ifname{K. C. G.}}\iname{\isurname{Name11}\ifname{Y. ...
5
votes
1answer
100 views

Any way to set a variable externally?

I just posted a question and can now generate a conditional section in a text: how to make a conditional document feature But to extend and generalize the question, first how could I create a ...
4
votes
2answers
134 views

how to make a conditional document feature

I saw in another question about how to create a condition, of which the best practice recommended was \iftoggle. I want to create a macro that will allow the creation of a teacher's note, a section ...
13
votes
5answers
495 views

Test if the first character of a string is 'a'

Is there an easy way to make a macro returning a string (e.g. 'true') if the string input begins by some fixed character, say 'a' ? I can't figure how to combine the different packages to do this. ...
6
votes
2answers
122 views

Branching construct based on the (babel) language selected

I'd like to keep one of my presentations in German and English and have defined a corresponding boolean variable withifthen and a command to typeset either the German or the English text. Is there ...
7
votes
3answers
167 views

Defining tabular rows with macros using `\ifnum` leads to `Incomplete \ifnum`

I am trying to define tabular rows using a macro which shall perform an conditional definition of the tabular row according to a given parameter. Please consider the following MWE: ...
14
votes
5answers
272 views

A macro that conditionally disregards the need for one of its arguments

Let's suppose I want to write nested equations that contain a fair few nested parenthetical/delimiter characters, like (), [], {}, ||, and perhaps others. Suppose too that I think these things look ...
9
votes
2answers
89 views

How to expand \ifthenelse so that it can be used in \parshape?

How do I get the following MWE to work: \documentclass{article} \usepackage{xifthen} \usepackage{lipsum} \newboolean{bar} \setboolean{bar}{true} \def\foo{\parshape = 2 ...
4
votes
3answers
512 views

Misplaced \omit and \multicolumn in \IfEqCase

I have the following code with a command that creates rows for a tabular: \documentclass[letterpaper,10pt]{article} \usepackage[utf8]{inputenc} \usepackage{xstring} \newcommand*{\condrow}[2]{ ...
17
votes
3answers
807 views

Conditionally Remove Brackets

I'm trying to create a command with an optional argument using \newcommand{\Af}[1]{{\mathbf{A}_{(#1)}} where the argument is a number. However, I'd like that if no argument is given the bracket ...
4
votes
1answer
85 views

Testing for “emptiness” (theoretical consideration)

Consider the following theoretical problem: Sometimes, in LaTeX one wants to do the simple test if a macro is empty, e.g. \def\foo{% This is... \ifx\baz\@empty Sparta! \else a pony farm. \fi } ...
2
votes
1answer
62 views

Conditional based on packageoption

I added a counter to the todonotes packages \todo so I could display the total number of todos I have left. However I also enjoy working with the package option disabled. Therefore I would like to ...
7
votes
2answers
141 views

newcommand conditionals

I am looking to create a command that adjusts my page layout, here is a sample: \newcommand{\margin}{ \pdfpageheight 297mm \pdfpagewidth 210mm \pagebreak \newgeometry{lmargin=31.5mm, rmargin=31.5mm, ...
3
votes
0answers
30 views

Unexpect differences between calling \ifmmode from within a command and outside a command [duplicate]

In answering another question regarding testing for math mode, I proposed the following command \newcommand{\testa}{% \ifmmode ^{12}\text{CO(1-0)}% \else $^{12}$CO(1-0)% \fi } But ...
8
votes
2answers
163 views

Macro with environmental dependent output

I'm trying to develop a macro that gives two different outputs depending on whether it is in math mode (i.e. $ $ or \begin{equation} ... \end{equation}) or anywhere else. The reason is that I use a ...
9
votes
3answers
680 views

Using counters and \ifthen in a macro: what's wrong?

I have (made, actually) a graphic of the forepaw-print of a bear that I want to use as a flourish mark at the end of chapters and a few other places. After finishing with the image, I created a mirror ...
10
votes
2answers
205 views

How to create command that creates new if command?

I want to load parameters (for conditional compilation) from files. I wrote command param that creates new if command and read parameter from file, containing following line: \paramnametrue % or ...
16
votes
3answers
328 views

newcommand does not work with \fi

I tried the command \newcommand{\fistudenti}{\fi} but it seems to work properly only in some cases. Here below there are two insances when it works and when it does not: WORKS: ...
3
votes
2answers
77 views

Replace and add a/to a specific sequence of tokens

Is there a way to find a specific sequence of tokens and add after it a command? Or is there a way to find a specific sequence of tokens and replace it with another one? And do it only if the sequence ...
1
vote
2answers
81 views

Print macro content with condition

I would like something like the following: \documentclass{article} \newcommand{\acell}{} \newcommand{\bcell} \newccomand{\zcell}[1]{#1} \ifx\acell{A} \ifx\bcell{A} \zcell{yes} \else \zcell{no} ...
12
votes
2answers
490 views

Is a TeX macro defined?

I am looking for a way in TeX to check if a macro was defined. Currently I use a rather tangled way. I exploit a sort of side effect when comparing two macros via \ifx; this command returns: true, ...
6
votes
2answers
377 views

Expand command read from file

I have a file, that contains a list of latex commands each command per line. Now I want to read this file line per line and execute/expand the macros automatically. I tried the following but this only ...
0
votes
0answers
47 views

How to test if an command is empty {}? [duplicate]

I used \newcommand* foo {} to define a command so the user could set it later via \renewcommand* foo {content}. How do I create a conditional statement (if then else) that tests if foo is empty ("{}") ...
12
votes
1answer
196 views

Simple way to switch inline asymptote figures on and off

I use the inline asymptote environment \begin{asy} to draw a lot of the figures in my papers. To those not familiar with asymptote, the asymptote package creates *.asy files for each of the asy ...