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# Questions tagged [tikzmath]

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### Is print in TikZ's math, useless?

In the manual of TikZ 3.0.0, the section about the math library, we can read (p. 635): Unlike the print keyword, the brace notation can be used in functions so that tikz path commands can be safely ...
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3k views

### Tikzmath: use array

I'd like to use arrays in tikzmath. I'd like to be able to manually define an array, with the equivalent of the python code myarray = [1,0,0,1,1], and I also would like to be able to access it in ...
• 6,605
650 views

### Double rounded curves in Tikz

I am trying to do a graph with tikz, and I would like your help for some details and technicalities. I am trying to do something resembling the following : Here are my problems. 1) I am currently ...
• 877
834 views

### Test of integers? Or, round the number if the first two decimal numbers are sufficiently close to 0 or 1?

The following is a MWE, which explains my intention. \documentclass{article} \usepackage{tikz} \usetikzlibrary{math} \begin{document} \tikzmath{ \integer = 4/2; \decimal = 5/3; \integerB=1/3*3; } \$\...
• 153
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### How do I draw on images embedded with \includeimage in TikZ with pixel accuracy?

I want to draw on an image which I embedded using \includeimage: \documentclass[tikz]{standalone} \begin{document} \begin{tikzpicture} \node[anchor=south west,inner sep=0] (image) at (0,0) {\...
• 155
1k views

### Tikzmath, ERROR: Missing \endcsname inserted

I'm trying to use tikzmath to draw lines between a set of points, however I've an error ERROR: Missing \endcsname inserted. on the line \ni=\i+1;. Any idea why? \documentclass{article} \usepackage{...
• 6,605
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### pgfplots on tikzmath function with conditionals returns an error

Plotting with pgfplots a function defined using the tikzmath function syntax does not seem to work. The error message : ! Illegal unit of measure (pt inserted). <to be read again> ...
• 6,321
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### \text{ } subscript size in tikzmath macro is not correct

This question is related to this earlier TeX-SE question of mine I would like to have a proper text subscript using the \text{} command. It does not seem to work with the tikzmath macros. Please ...
• 1,148
223 views

### Compound Pathway Problem with holes

The picture below is what I am trying to create. I have asked a similar question before, and I got an excellent answer, but it's still not 100% what I am looking for. I know that I have to use \...
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### leading zero in \foreach of a TikZ calendar

The calendar TikZ library creates for each day a node called (<name>-<year>-<month>-<day>). But there is a leading zero for <day> from 1 to 9, that is, to use the node of ...
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203 views

### Decimal places in fixed point arithmetic with negative numbers

I have the code: \documentclass[tikz,border=5]{article} \usepackage{tikz} \usepackage{xfp} \usepackage{amsmath} \usetikzlibrary{math} \usepackage{fp} \usetikzlibrary{fixedpointarithmetic} \begin{...
• 1,358
647 views

### Can't use "if" in tikzmath - undefined control sequence "ifpgfmathfloatparseactive"

MWE (copied from TikZ manual): \documentclass{article} \usepackage{tikz} \usetikzlibrary{math} \begin{document} \begin{tikzpicture} \tikzmath{ int \x; for \k in {0,10,...,350}{ if \k&...
• 2,052
93 views

### Dealing with recurrent sequences

I have the following code to calculate the approximations for arctan(1) recursively: \documentclass[varwidth,border=5]{article} \usepackage{tikz,pgfplots} \usepackage{fp} \usepackage{xfp} \...
• 1,358
90 views

### Rectangular table with consecutive integers using foreach

I'd like to have a rectangular table with integers (like a lottery ticket), let's say 4x9, numbers from 1 to 36. I assumed that it is easy with tikz, two foreach loops. Like this: \foreach \i in {0,1,...
84 views

### Conflict in the Key Values in Nested Tikz Enviroments

I am developing some Tikz commands with pgfkeys, and I want to use the commands that I developed earlier in my new commands. This creates nested Tikz and Tikz math enviroments as shown in the MWE ...
• 1,148
66 views

### Draw arcs so they are facing each other, starting at a certain point

I am trying to draw two arc sectors whose origin is an arbitrary point. I feel like I am missing something here, because this should work, but, as you can see in the image below, the red arcs are ...
• 518
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### Conditional tests on string variables in tikzmath library

Is it possible to test for strings in the tikzmath library? (E.g. if <variable>=<string expression> then foo) I tried a naive test and it returned this error: Package PGF Math Error: ...
• 79
150 views

### Tikz computes the wrong coordinates

I'm trying to calculate some coordinates to get an accurate tikz figure. I managed to do it by hardcoding some coordinates, but since I have to repeat the process for many of them, I thought it would ...
• 3,009
404 views

### How can I set a tikz-node's anchor using a variable?

The following code works as expected. \documentclass[tikz,margin=1em]{standalone} \usetikzlibrary{math} \begin{document} \begin{tikzpicture}[scale=3] \draw (0,0) circle [radius=1cm]; \foreach \a in {0,...
940 views

### How to specify the units of a variable in \tikzmath or argument of a \newcommand that uses pgfkeys

I would like to specify the units of an argument of a \newcommand that uses pgfkeys and that goes into a \tikzmath enviroment as a variable as follows: \documentclass[12pt]{article} \usepackage{tikz} ...
• 1,148
250 views

### For loop not working around tikzmath

I am trying to draw the dynamics of a discrete dynamical system using Tikz. I'd like to use a loop to do so, but for some reason it does not perform the \tkzmath operations inside the loop. Here's the ...
• 23
55 views

### Maximum and argmaximum in Tikzmath [closed]

tikzmath are several math functions. However, I would like to find the maximum number in a given array and the index where the maximum occurs. How can I do this in tikzmath? Could anyone provide a ...
• 1,358
53 views

### In tikzmath the "random" puts ".0.0" if want negative random number [duplicate]

Here is a MWE: \documentclass{article} \usepackage{pgf} \usepackage{pgfplots} \usetikzlibrary{math} \begin{document} \tikzmath{ int \foo; \foo = random(-16,10); print {Foo value: \foo.}; } \...
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### Why do the three small triangles not coincide exactly? They are unexpectedly shifted (tikz math library recursive function calls) [duplicate]

It is probably some silly error on my part, but I am trying to understand why the three green triangles do not coincide exactly -- instead, they are unexpectedly shifted. (The original intent was to ...
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### Unable to use tikzlibrary packages [closed]

UPDATE: Solved. See my comment below for the fix. I've been trying for the life of me to figure out how to use the math tikzlibrary (\usetikzlibrary{math}), and no code works. I fear that it has ...
1 vote
102 views

### Syntax of \tikzmath{function....?

What is wrong with the syntax of the two \tikzmath function definitions function here? \documentclass{article} \usepackage{tikz} \usetikzlibrary{math} \tikzmath{function f(\x) { return sin(\x); } \...
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1 vote
454 views

### Creating tikz commands, automatically drawing labelled square

So I want to create a macro that I can use to automatically generate a rectangle in TikZ. I would like to specify text (an equation) that should be placed in the middle and automatically generate ...
• 48
1 vote
250 views

### When to evaluate a custom math function in a tikzpicture environment using pgfplots

I want to draw a custom function using pgfplots, and add an annotation node: \begin{tikzpicture}[ >=stealth, evaluate={ function f(\x) { return cos(2*\x); }; ...
• 101
1 vote
282 views

### How to place evenly spaced nodes in TikZ from (node1) to (node2)?

I have a relatively long and shallow rectangle, on the bottom of which I need to place some nodes. I don't want to manually fit coordinates, and naturally, I don't want to copy the same code several ...
1 vote
108 views

### tikzmath: strange replacement

I don't know why, but I tried to print some code in a tikzmath file, and the result is really strange, it looks like that tikzmath tries to substitute texts even if does not begin with a backslash... ...
• 6,605
1 vote
64 views

### splitting maths in two lines in a node

I have the following code: \documentclass[border=2mm]{standalone} \usepackage{tikz} \usetikzlibrary{shapes.misc} \usetikzlibrary{calc} \tikzset{cross/.style={cross out, draw=black,ultra thick, ...
• 748
1 vote
366 views

### 3D Piecewise Plot with varying bounds in Tikz/PGF

The function to be plotted reads as In it, these constrains hold true: If plotted it looks like Please excuse the different symbols, I will explain: p/p_0 is equivalent to \Pi and \gamma is ...
• 739
1 vote
594 views

### Error when compiling using tikzmath

I am trying to learn how to use Tikz and its library Tikzmath to make graphics. I am trying to practice by drawing a series of circles along a line. My code is as follows: \documentclass[tikz]{...
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1 vote
1k views

### Using math functions in a tikzmath coordinate

I am trying to execute the following code where I compute the coordinates using the TikZ math library and then I draw them in TikZ. Why does it output error ! Package pgf Error: No shape named '2*cos(...
• 3,510
1 vote
3k views

### \input inside \newcommand and macro parameters

I would like to divide a list of parameters for a series of tikz graphics into a bunch of separate, named tex files. Specifically: each parameter file should be loaded by an \input command which in ...
• 79
1 vote
34 views

### tikzmath produces an error when the trigonometric functions are used [duplicate]

Why does the following code: \documentclass{article} \usepackage{tikz} \usetikzlibrary{math} \begin{document} \begin{tikzpicture} \tikzmath{ coordinate \v; \v = (cos(pi),sin(pi)); } \end{...
• 10.8k
1 vote
305 views

### Manual of tikzmath

I am a strong user of tikzmath to implement several things in the numeric calculus. However, I miss of a complete manual of tikzmath (separate of tikz), where I can to find all its features, functions,...
• 1,358
1 vote
434 views

### Change element in pgf math array

I want to change the element of an pgf math array within a multido environment where a random element is incremented by 1: \def\list{0,0,0,0,0,0,0,0,0,0,0} \multido{\i=0+1}{20}{ \pgfmathsetmacro{\...
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### Problems with using \tikzmath to draw ellipses

\documentclass{article} \usepackage{tikz} \usetikzlibrary{positioning} \usetikzlibrary{arrows} \usetikzlibrary{arrows.meta} \usetikzlibrary{patterns} \usetikzlibrary{patterns.meta} \usepackage{...
49 views

### tikzmath arithmetic calculations using predefined variables

I'm trying to do calculations in tikzmath using some predefined variables. Here's an example of what I have \usepackage{tikz} \usetikzlibrary{math} \begin{tikzpicture} \tikzmath{ real \ang = 30; ...
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### How to assign a value of the form (my node.east) to a coordinate variable inside the argument of a tikzmath command?

The PGF & TikZ manual for version 3.1.9a (the current version) has this to say about the coordinate keyword of the math TikZ library (p. 706): coordinate 〈variable〉, 〈additional variables〉; This ...
• 10.8k
71 views

### Reset tikzmath variable in for loop

I want to draw multiple curves (each with a different slope) using tikzmath coordinates: \begin{tikzpicture} \begin{axis}[ xmin=0, xmax=1, ymin=0, ymax=1, width=\textwidth, ...
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### Use tikzmath in between connecting coordinates with the draw function

If I understand correctly, the \draw function allows one to connect points with lines, and then (if the lines come back to the same point) fill the outlined shape. If one uses the -- ( , ) command it ...
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