{conditionals} is about macros like \if and \ifx that may execute other macros depending on whether certain conditions are true or not. Popular packages are {etoolbox} and {ifthen}.

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2
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27 views

Format cells if they contain a specfic symbol with siunitx

In my previous question, David Carlisle gave a great solution for coloring all text in a cell when the cell contains an \*. I played a little bit with this code, but couldn't include it, if the ...
3
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1answer
15 views

Format cells if they contain a specfic symbol / conditional cell color

I found a great piece of code by jfbu: \documentclass{article} \usepackage{color} \usepackage{etoolbox} \begingroup \lccode`~`- \lowercase{% \endgroup\pretocmd{\tabular}{\catcode`~\active\def~{\...
2
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1answer
21 views

Define a colour depending on a variable

I'm trying to set a colour depending on the content of a variable. Please have a look at the MWE below. In case of \junk{A} the text should be red on a green background. In case the content of \junk ...
4
votes
1answer
30 views

How can I make a command execute exactly once in an AMS environment?

I'm wanting to create a command similar to AMS's proof environment that automatically calls a command (like AMS's \qedhere) when it gets to the end, but allows you to call the command earlier if you ...
4
votes
2answers
203 views

Why can't I use braces in an \if… \fi group?

I am starting to use \newif in a LaTeX class definition to finally stop carrying around all my definitions and imports from article to article. Since I am trying to define options, I am ending ...
3
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1answer
35 views

How can I make a command execute exactly once in an argument?

I'm wanting to create a command similar to AMS's proof environment that automatically calls a command (like AMS's \qedhere) when it gets to the end, but allows you to call the command earlier if you ...
8
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2answers
37 views

How can I conditionally designate an active quote in csquotes.cfg?

How can I conditionally designate an active quote in csquotes.cfg so that no error is produced if the same character is made into an active quote in the .cfg and the document's preamble? I have the ...
2
votes
1answer
19 views

Pass iteration variable from foreach to custom command

I am trying to figure out why the following code does not work: \documentclass{article} \usepackage{etoolbox} \usepackage{pgffor} \newcommand\setProblemShow[2]{% \csdef{isProblemShow#1}{#2}} \...
3
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1answer
26 views

Looking to distinguish between a scale factor and a dimension

I'd like to be able to define a macro, say, \def\testit{<something>} and then test to see what <something> is. If <something> is a dimension (e.g, 4in) then I can do \resizebox{4in}...
3
votes
1answer
27 views

ConTeXt : defining specific behavior with mode

I'm trying to define my own start/stop block, for a conditional compilation with some formatting. I tried to use modes and add a margin rule if the block is to be shown. However, it compiles ...
2
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2answers
48 views

how to use verbatim or verb after checking for flag using \ifbool{}{}?

I had no idea that verb or verbatim are not allowed inside \ifbool check. This makes it very limited. I needed to generate code based on a flag. The code to generate happened to have small part of it ...
2
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1answer
15 views

Tasks: two column under certain condition

With the help of the task package you can produce easily enumerated lists with two or more columns: if you write \begin{tasks}... everything is printed in one column if you write \begin{tasks}(2)... ...
1
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1answer
33 views

If Not Switching When In Environment

I have the following environment to create an invoice. It works perfectly except that the rows do not switch between light and dark gray (they stay light) so I assume that \iflight is staying true. If ...
3
votes
1answer
85 views

Comment Package: Problem when using German Special Character “ß” (Similar to “ss”) [duplicate]

I am preparing a bilingual document and using the comment package to distinguish between the two languages. When I use the special character ß in a comment environment then I get an error message (...
3
votes
2answers
49 views

LaTeX3 RenewDocumentCommand for cite with an optional argument for punctuation

When working with citations there are many distinct ways the citation must be incorporated within the text. Even when you work exclusively with number formats (this example excludes Author year style ...
3
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1answer
37 views

How to place a enumerate environment within an if statement?

Why does the following minimal working example produces an error unless the enumerate environment is removed? Is there a simple workaround? \documentclass[10pt,presentation]{beamer} \newif\...
1
vote
1answer
43 views

pgfkeys and ifs

I'm still looking for a viable solution to have "conditional pictures", or pictures, where I can enable and disable certain parts of the pictures with styles (very much like beamer overlays). My aim ...
4
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2answers
93 views

A simple macro for optimization problems (ifnum error)

I am trying to create a simple macro for optimization problems that must (as per the publisher) compile with LaTeX2e. I want the macro to look like the example below in terms of usage (the actual ...
5
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2answers
65 views

Using \if in a tabularx

I am trying to use \if within a tabularx environment. This works: \documentclass{scrlttr2} \usepackage{tabularx} \begin{document} \newcounter{x} \setcounter{x}{0} \begin{tabularx}{\...
1
vote
1answer
17 views

Suppress Sections with Key in Preamble

How do I suppress a section unless a line of code activates it or suppress it with a line of code that I can comment out? This line of code has to be placed at the top of the document. For context, I ...
6
votes
2answers
48 views

Problem with nested 'ifnum' when checking evenness of parameters

I would like to know how to check properly for evenness or oddness within some macro. I have played a little with fp and pgfmath package, but it seems I am not keen enough in TeX to do it properly. ...
2
votes
1answer
35 views

CsvSimple with tabular: set specific number of rows

For a tabular environment with csvsimple I would like to set the number of rows specifically. This example is an attempt to show only the first two rows: \documentclass{article} \usepackage{...
9
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3answers
405 views

Do all \if's need to be defined before a nested if?

I have this MWE, which does not compile (Extra \else, Extra \fi) unless I load the showlabels package before the outer \if. (\ifSL@AMS is defined in showlabels.sty.) Is that a general requirement that ...
4
votes
2answers
92 views

If-if-else-expression using a variable

I am trying to create a document class containing the layout for a bachelors thesis and want to keep it as general as possible. In my title page (which is defined in the document class, not the main ...
3
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1answer
36 views

Conditionals work, Listings work, but when put together, no [duplicate]

In an earlier question I learned the following code to define conditionally compiled text (for a teacher guide) \newtoggle{teach} \toggletrue{teach} \NewEnviron{teachr} {\iftoggle{teach}{\BODY}{}} \...
8
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1answer
60 views

Generating two pdf versions (based on conditional statement) from same tex file with arara

I teach university courses and my goal is to be able to output two pdf's from the same tex file: A problem set A problem set with solutions I already do this manually by calling \newif and then ...
3
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1answer
20 views

how to use \footrue inside environment definition

Based on this clear explanation by @David, I tried to define a command to test if a particular environment was used or not. But I really don't know why the result is always false. MWE \...
4
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2answers
37 views

Why doesn't this simple conditional code work in the tufte-book class?

This is follow up question to If Then Else for odd page/even page. Why doesn't this simple conditional code work in the tufte-book class? It shows me Even on every page! while it works fine in the ...
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2answers
50 views

Global variable to macros

I have a eskdi.sty style file where I define two command: \newcommand{\gostorganizatia}[2]{% \ifnum #1 = 1% 1 - text; 2 - logo \gdef\gostorganizatiaopt{text}%% \def\gostorganizatiatext#2{\...
2
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0answers
18 views

How to branch based on the documentclass? [duplicate]

I have a macros.tex file where I keep my macros and I use them with different document classes. I want to skip including some of my macros based on the document class (e.g. if it is beamer). How ...
8
votes
2answers
275 views

Does \InputIfFileExists not work anymore?

For several years I've used the following in most LaTeX documents to input a macros file that lives in different folders on my Mac and my Linux machine: \InputIfFileExists{/Mac/path/macros.tex}% {\...
6
votes
3answers
136 views

Conditional formatting in \newcommand

I'm using the following from a dictionary template: \newcommand{\entry}[4]{\framebox(7,7){}\hspace{.75em}\markboth{#1}{#1}\textbf{#1}\ {(#2)}\ \textit{#3}\ $\bullet$\ {#4}} \entry{Purfling}{pur-...
4
votes
1answer
159 views

How do I get list of all predefined \if commands in LaTeX?

I was trying some programming in LaTeX and found that \ifx was predefined, since I get an error from this: \documentclass[10pt]{book}% \newif\ifx \xtrue \begin{document} \end{document} Then I found ...
0
votes
2answers
33 views

If condition controlled with a loop variable

I want to print some images according to a variable being changed in a loop: if variable group is 1, then the image should not be printed. But if the value of group is 2, then the image should be ...
3
votes
2answers
82 views

How does \if actually get used?

I apologize if this is too newbie or a duplicate, but I've banged my head against it long enough, and searched without success. :( I am trying to use an \if to test for an empty string without ...
4
votes
1answer
76 views

avoid logarithm of zero in pgfmathparse conditional assignment

How can i avoid the error message ! Package PGF Math Error: I cannot calculate the logarithm of '0' (in ' 0>1 ? ln(0) : 0'). in the following code? If possible, i want to evaluate the statement ...
5
votes
2answers
93 views

\@ifpackagelater equivalent for babel's lan­guage def­i­ni­tion files?

It is possible to make conditional constructs based on the version ⟨date⟩ of a ⟨package⟩, thanks to \@ifpackagelater{⟨package⟩}{⟨date⟩}{⟨yes⟩}{⟨no⟩}. So far, so good. But this doesn't work for babel-*...
4
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1answer
58 views

Choose color based on value for Kpi reporting

I trying to make a report containing colored spheres that should be wrapped in a command and updated dynamically. I have defined af colored sphere that receives a color, a value and a text. The color ...
3
votes
3answers
137 views

Creating a macro that conditionally turns on an \iffalse and \fi

I'd like to construct a conditional \iffalse and \fi. Specifically, I'd like to define a counter and a macro such that if the counter set to one,the macro would either set an \iffalse, if the argument ...
2
votes
1answer
31 views

defining a global flag to conditionally remove text

Apologies in advance. I deleted many features for my mwe, but I find LaTeX so hard to debug that the act of cutting out creates more errors and triggers more questions so I'm keeping it as it is at ...
1
vote
1answer
29 views

Include optional text versions within one file [closed]

I'm still new to LaTeX and I'm not sure if this can be done, so here goes: I've got two .tex files, there pretty similar and instead of updating them individually, which as got to be a pain. I want ...
0
votes
1answer
26 views

Print \newpage under certain conditions [duplicate]

I want to define a command which prints \newpage if the remaining free space on the current page is below a certain size, e.g. 200pt. I tried to adapt the snippet to my needs. The problem is that the ...
2
votes
1answer
146 views

Check if a string is just numbers or includes letters

Well, the title pretty much says it all, I'm looking for a way to tell if a string has any letters in it or if it's made up of just numbers. I used biblatex as a tag here because of my question's ...
2
votes
1answer
39 views

Test if package with given options can be loaded

I need to introduce in my preamble a conditional structure to load a package if its complete version is installed, load its light version if it exists, or load some standard package otherwise. The ...
2
votes
2answers
100 views

Conditional test inside command parameter

I want to call \includegraphics with parameter width= #1\textwidth if the number i have provided thru \mycmd is >= 1 and scale= #1 otherwise. I already saw this: Can I conditionally scale an image ...
2
votes
4answers
86 views

Setting a counter value based on a conditional statement?

I've been trying to google and this seems like a silly thing that should be obvious, but everywhere I look is answering how to use counter values inside a conditional statement, which I can do fine. ...
3
votes
2answers
126 views

Check if two labels are undefined

I'm struggling to test if there are two labels undefined, in order to include some specific files only in that case. Until now, I only needed one condition: workshop, so I was checking like: \...
2
votes
1answer
26 views

Codeblock execution conditional on filename

When making minutes of a meeting, I use two .tex files: an agenda- and a minutes file. The first one is included in the second one with the pdfpages package. Now, whilst the two files are identical ...
2
votes
0answers
12 views

Combining \DTLgmeanforall with a conditional in a table created by datatool

I am organizing a list of students an there marks for exams in a .csv Document. These are printed in a tabular environment with the help of datatool. The Table lists the marks an the resulting mean. ...
2
votes
0answers
48 views

How do I let a float know on which column it is placed?

Is there a safe and sound way to let the insides of a float environment know on which column the float is placed? Here is an examples that fails: \documentclass[twocolumn]{article} \usepackage[...