{foreach} is for questions regarding the TikZ/PGF module of the same name which can also be used as a standalone package pgffor.

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5
votes
3answers
311 views

Correcting TikZ code

foreach how to fix the code below so that the center of the figure is at the origin (0,0)? \begin{tikzpicture} \fill[blue] circle (2pt) node[right] {$(0,0)$}; \draw (-3,1) -- (3,1); \draw[blue] ...
7
votes
2answers
361 views

tikz/foreach: Protect space after “iteration variable”

I try to draw some nodes in tikz, and as they are very simple I wanted to "shorten" this using a \foreach command: \foreach \xnum in {1,2,3,4,5} { \node at (X\xnum center) {$x_\xnum$}; } You ...
4
votes
0answers
242 views

Drawing a gear with Tikz [duplicate]

I need some help to modify the \gear macro of this answer in order to be able to fill the drawn gear with a solid color. I've tried to move the \draw command outside the loop, but it does not work as ...
3
votes
2answers
323 views

\DTLdeletedb (from datatool package) has no effect within \foreach

This question led to a new feature in a package: datatool \DTLgdeletedb is available in (v2.13) and later. I am trying to use a \foreach loop to iterate over a few items. For each iteration ...
6
votes
1answer
540 views

External images displayed in circle

I'd like to have several external images organized in a circular shape, with TikZ drawing on top of it. I tried the scope option in TikZ with \includegraphics command, the whole thing being included ...
3
votes
1answer
299 views

How to make hyperlinked tabs with specific colors?

I modified this project How to print section titles like tab-list? in the following way: usletter, 8 tabs on the edge of paper, odd pages only, text within the tab is set by the user (\TabText), ...
3
votes
1answer
241 views

Using foreach to generate computed indices in a plot

I have a table with 8 columns, and I want to generate 4 plots (1 vs 0, 3 vs 2, 5 vs 4, and 7 vs 6). I was going to use foreach to generate the plots using \begin{tikzpicture} \begin{axis} \foreach \x ...
1
vote
0answers
405 views

tikz foreach used for number in filename for addplot [closed]

I have quite a few tables generated which I want to plot in the same TikZ figure (using pgfplots). I am currently trying to use a foreach loop to plot them all, but it is only plotting the last ...
6
votes
3answers
184 views

Expansion issue when adding to CSV list from within a \foreach

Another expansion issue that I am unable to guess at the correct combination of \edef/\expandafters to get to work. Background: Below I have defined \AddToCommaSeparateList which uses \g@addto@macro ...
5
votes
1answer
325 views

tikz gives null character in \document

Please why does \begin{document} \begin{tikzpicture} \foreach \x [remember=\x as \lastx (initially A)] in {B,...,H}{% $\overrightarrow{\lastx\x}$, } \end{tikzpicture} \end{document} give Missing ...
11
votes
1answer
328 views

\foreach has a problem with ‘initially’ argument in remember part

Is there an error in my code or did I find a bug? It seems like the \foreach statement doesn’t increase \lastn if there is an initally (value) but it works with a manually given initially value ...
6
votes
2answers
471 views

How to make global a color list definition with \@namedef done inside a foreach loop

Motivation As stated in the title, I'm trying to define a command able, from a list of colors as input, to create a list in which colors are numbered. This, manually, has been done in Arrows ...
8
votes
3answers
2k views

How to get the list of predefined colors in xcolor such that the list can be used in foreach looping?

I need to get the list of predefined colors in xcolor. Hard-coding as follows is not a good coding practice. \documentclass[dvipsnames,cmyk]{minimal} \parindent=0pt \usepackage{pstricks} ...
7
votes
3answers
214 views

Defining commands using two loops

I would like to define a series of command using two loops. For instance I want to create a series of variables that can have YY or NN as subscripts. I would like to define commands \yy and \nn that ...
11
votes
3answers
529 views

Using \foreach loop in Cubic B-spline curve refinement

This question is only about TikZ (/PGF) implementation. This is a MWE of what I want to ask for: \documentclass{article} \usepackage{tikz} \usetikzlibrary{calc} \begin{document} ...
8
votes
3answers
539 views

How to invert list used for a tikz foreach loop

Given \def\stuff{a,b,c} I would like to be able to do \foreach \x in {c,b,a} {...} without inverting the list \stuff manually. For example is there some sort of \invert macro that would allow me ...
5
votes
2answers
198 views

Have \foreach restart or loop

I understand that trying to have a "loop function" like \foreach loop sounds like a paradox but I'll try to explain what I mean. Recently, I've asked a question about automatising the creation of ...
3
votes
2answers
361 views

Numbers as markers with \foreach and additional macro based on counter

First issue I would like to plot several curves using the \foreach command and have their number in the sequence as markers. Here is the code I came up with : \documentclass{article} ...
15
votes
3answers
449 views

How keep a running list of strings and then process them one at a time

I would like to keep track of all the \AddRef commands in a document and then process them one at a time, for instance print them in the document on one line per value. It seems that this should be ...
6
votes
2answers
257 views

Using etoolbox macros in tikz foreach loops

I am trying to wrap my head around etoolbox for use with TikZ. In this example (I know there are probably simpler ways to do this), I would like to draw a series of rectangles that are next to each ...
5
votes
1answer
1k views

How to loop through a list of tikzpicture within animateinline?

I have the following code which uses animateinline and several tikzpicture for it's animation effects: \documentclass{beamer} \usepackage[utf8]{inputenc} \usepackage{tikz} \usepackage{ifthen} ...
4
votes
2answers
1k views

TikZ: Drawing the same data with scatter plots and parallel coordinates

I am new to TikZ and trying to recreate the following image (which was created in R): (Translation: correlation = +1, correlation = -1, two clusters, circle, normal distribution) Each "column" ...
5
votes
2answers
654 views

tikz \foreach dynamic list with environment arguments

I'm making an axis environment that recieves 5 arguments (the first is optional and it's 1 by default). To make the x marks on the x axis I use \foreach \x in {#2,...,#4} {\ifthenelse{\x = 0}{}{\draw ...
13
votes
1answer
636 views

Why do paramaters of \renewcommand need to double up the # within a \foreach

Introduction: When you use \renewcommand within another macro or environment, one needs to double up the ## to access the parameters of the inner macro. This serves as a way to distinguish the inner ...
2
votes
3answers
239 views

Macro to check if an element is a member of a list, and access associative lists

Inspired from Macro to access a specific member of a list. I want to have a macro implementing the lisp functions (member item list) and (assoc id alist). The first checks if an item is contained in ...
7
votes
1answer
491 views

How to define macros in a foreach loop with effects between iterations and after the loop without using global?

Without using \global, the following code: \documentclass{minimal} \usepackage[T1]{fontenc} \usepackage{tikz} \usepackage{etextools} \newcommand\appendbyforeach[2]{% ...
6
votes
1answer
512 views

How to assign values with foreach?

I have trouble to assign values with \foreach. Can somebody help me? The following code is wrong. The purpose is to asing the values: \lx1=1, \ly1=2, \lz1=3, for example. \foreach \x/\y in ...
12
votes
1answer
555 views

How to expand a macro used in the range of a foreach loop?

Motivating Example: Suppose that I want to draw the following tree: root / \ / \ / \ A B C D This is easy enough to do by explicitly drawing the two subtrees as children of ...
10
votes
2answers
806 views

Getting last value in tikz foreach

I tried this, but it doesn't work as intended: \foreach \x/\index in {4/0,5/1,19/2} { \ifnum \index > 0 % use lastx \fi \pgfmathsetmacro\lastx{\x} } How do I set \lastx properly?
7
votes
4answers
638 views

How to create a triangle of dots in TikZ using the foreach command?

How to create a triangle of dots in TikZ using the foreach command? I need this.
18
votes
4answers
2k views

Multiple TikZ keys with foreach

Playing around with pgffor, I'm trying to slightly modify an example from the TikZ/pgf manual: \path \foreach \x/\content/\style in {% 0/a/draw, 1/b/{draw,red}, 2/c/{circle,blue}, 3/d/draw% } ...
7
votes
3answers
1k views

Use TikZ foreach variable in node

This MWE \documentclass{standalone} \usepackage{pgfplots} \begin{document} \begin{tikzpicture}[scale=0.75] \begin{axis}[ylabel=Y-Axis, xlabel=X-Axis , xmin=2, xmax=10, ymin=0, ymax=12, ...
5
votes
1answer
2k views

Package pgfkeys Error: I do not know the key '/tikz/ '

I have an error when I want to compile the LaTeX code below when I set \var to 1. Otherwise I have no problem. The error I got is: Package pgfkeys Error: I do not know the key '/tikz/ ' Could you ...
2
votes
2answers
382 views

Impossible to use the variable set by \foreach as a variable in a function

The latex code below does not compile. This is due to \foreach and the function \getcolor. Does anybody know, how I can use the variable set by \foreach in a function. Find below the code ...
4
votes
1answer
561 views

Lengths and for-loops

It seems that lengths are not updated in for loops. Compiling the code below: \documentclass{article} \usepackage{tikz} \newlength{\test} \newcommand{\inc}{\addtolength{\test}{1cm}} ...
14
votes
3answers
2k views

Copy table row n times

I would like to copy the row of a table, let say, n times, but unfortunately my sample below does not compile. It is my understanding that the \foreach command should copy what is in its argument but ...
16
votes
3answers
12k views

TikZ: Using Loop to Draw Grid of Nodes

I am trying to draw an Ising model (in my case, a grid of nodes with an undirected edge between adjacent nodes on the same row or column) using TikZ. I have the grid of nodes working nicely using a ...
7
votes
3answers
224 views

How to “demux” several aspects from a `\foreach` variable with `\ifstrequal`?

How can I "demux" several features from a mode specification given in a \foreach? I would like to use a \foreach to draw several nodes in a TikZ picture. The loop will specify a mode for each ...
3
votes
2answers
562 views

forarray and a \gdef list parameter

\documentclass{article} \usepackage{forarray} \begin{document} \newcommand{\mytext}[1]{\gdef\themytext{#1}} \newcommand{\mytest}[1]{\ForEach{,}{\typeout{\thislevelitem}}{#1}} % this one works, ...
10
votes
2answers
1k views

Tikz foreach inside matrix

Apparently this question has been asked a hundred times already. But I couldn't get it to work with any of the answers provided. I want to have nested for loops inside a Tikz matrix. Something like: ...
2
votes
3answers
310 views

Process Last Item in \ForEach (forarray package)

The following command of the forarray package \ForEach{,}{\thislevelitem(\the\thislevelcount) : }}{x,y,z} produces the output x(1) : y(2) : z(3) : I want to have the same output without the last ...
8
votes
1answer
382 views

Fill Nodes according to table/data file

I have a lattice of nodes generated by two \foreach commands. So each node has two numbers which define its location (essentially x and y coordinates). Is there any way to fill a circle at that node ...
12
votes
5answers
1k views

tikz loops, creating triangle with jagged hypotenuse

I am in dire need of constructing the image below. In short I am trying to create an exact replica of the image, and an alternative image, with a much more jagged hypotenuse. I thought about using ...
8
votes
1answer
950 views

Creating a fraction graph in TikZ

Ok, so I was helping a friend of mine with a fraction problem on how to represent fractions so that they are easy to compare for children. We were thinking of a ruler and separate the ruler into ...
7
votes
1answer
1k views

Sum and Difference on the number line using TikZ

I am trying to replicate the idea of sum and difference of real numbers on the number line and have been successful in some way. For example, the code: \documentclass[letterpaper]{article} ...
4
votes
1answer
333 views

PGF loop variables in string comparisons

In a bigger context, I need to check whether an integer parameter is contained in a set of numbers. I decided to encode sets as strings; elements are separated by !. I don't know whether this is the ...
7
votes
1answer
827 views

pgf's \foreach macro

Please is there a way of turning the group scoping of \foreach off? The following problem illustrates my difficulty. Without global assignment the aim is not achieved, but global assignments might ...
3
votes
2answers
374 views

How to cycle colors through the lines of a polygon

I want to shift the lines specification through a polygon. My current code looks like this (not DRY at all): \documentclass{article} \usepackage{tikz} \begin{document} \usetikzlibrary{shapes,arrows} ...
4
votes
2answers
549 views

How to iteratively draw a path e.g. with foreach

I have a long path and want to draw parts of it in an iterative manner \documentclass{article} \usepackage{tikz} \begin{document} \usetikzlibrary{shapes,arrows} \usetikzlibrary{calc} ...
3
votes
1answer
206 views

pass a set of numbers to pgfplotsinvokeforeach <list>

Is it possible to pass a numeric set to the list argument of the \pgfplotsinvokeforeach command? I need something like this: \newcommand{\a}{1,2,...,10} \pgfplotsinvokeforeach{\a} {<...>} ...