Questions tagged [pgfmath]
{pgfmath} concerns the pgfmath library used for internal computations in TikZ-pgf but which is also available for other computations in (La)TeX.
487
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How to use dynamic numerical variables in tikzpicture?
I am currently creating technical documentation that depicts through a tikzpicture the data flow across something called the I2C bus (example-like graphic). I initially started doing this by hand with ...
- 278
-1
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1
answer
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Pgfmath code conflict
I am using the following code, and it works except for the custom macro \QuadraticEquations.
However, it works in a stand alone file. Am I missing something obvious?
\documentclass{article}
\...
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0
votes
1
answer
41
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Make quadratic equation with pgfmath
I have used this code to produce quadratic equations, is there a way to make the solutions real and solvable for lower levels?
\documentclass{article}
\usepackage{mathtools}
\usepackage{enumitem}
\...
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1
vote
0
answers
31
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Something in my preamble breaks this tikz newcommand but only when used inside a foreach?
In a standalone document which I use to tinker with Tikz pictures before compiling in my main document as a way of saving compile time, I have used the following expression
\documentclass[tikz,border=...
4
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1
answer
87
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problem when using radians with tikz
My initial problem occurred with this code:
\def\a{pi/2}
\pgfmathparse{\a r}\pgfmathresult
output : 89.99937
When I modified the macro \a thus \def\a{pi}
I get the error: Package PGF Math Error: ...
- 90.4k
0
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1
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51
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Error using tikzmark with multiple tikzcd's
I wish to create a figure like the one shown below.
I am getting the error above with the following code. Can someone tell me where I may be going wrong?
\begin{tikzcd}[arrows={-latex, outer sep=-1....
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20
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Error in IEEE Access template (xdef) [duplicate]
I download the IEEE Access template from their webpage. The only thing I did was adding \usepackage{tikz} to access.tex. Changed nothing else. Compiling with pdflatex produces the following error:
$ ...
- 377
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93
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How to make a number spirale front cover to a book?
UPDATE: I'm currently rewriting a new edition with my math teacher's self-published maths textbook. I have looked online for similar problems with number spirals cover but couldn't find anything ...
- 11
2
votes
1
answer
62
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Use a variable in foreach
I am trying to use a variable in my foreach loop. It would make things a lot easier, because i only need to change one value and multiple loops are affected.
Something like this:
\begin{tikzpicture}[y=...
2
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1
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54
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Why does \ifthenelse not work?
Im currently dealing with a problem in my code. I keep getting the error use of \nextx does not match its definition From the \pgfmathsetmacro\nextAsInt... line. But i cant see the problem. It should ...
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How to make a spiral in coordinate system using Tikz [duplicate]
How do I generate a figure similar to this, but the value of 600° must be 1201°, and the spiral must take 3 revolutions (1201°/360°=3 revolutions).
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Summing up float values inside a tabularx
Note: this question is very similar to this one, but differs since I am using float values instead of int.
I am auto-generating a LaTeX table with a python script which contains times in decimal hour ...
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1
vote
0
answers
34
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Can we use random variables in \polylongdiv
I would like to randomly generate polynomials before using \polylongdiv for long division. I tried the code below to make one of the coefficients of the divisor random but the compilation takes ...
- 189
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0
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50
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Dimension too large - Tikzmath
I have the following code:
\documentclass[tikz,border=5mm]{standalone}
\usepackage{tikz}
\usepackage{amsmath}
\usepackage{xfp}
\usetikzlibrary{math}
\usepackage{etoolbox}
\usepackage{fp}
\...
- 1,102
4
votes
1
answer
73
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Using pgfmath in draw options
I would like to set draw options in tikz depending on some pgfmath calculations. More specifically, I would like to draw or not draw an edge depending on some value in an array.
This works fine if ...
- 55
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0
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tikz/pgfmath: Draw a signal-flow diagram from a transfer function
Following up this great answer, the following code needs to be fixed to make the transfer function with coefficients
\edef\NumCoeffMat{{4, 32, 62}} % numerator
\edef\DenCoeffMat{{1, 12, 66, 60}} % ...
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65
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Dealing with arrays in Tikzmath
I have the following working code to build the Lagrange Polynom of a given set of points:
\documentclass[tikz,border=5mm]{standalone}
\usepackage{tikz}
\usepackage{xfp}
\usepackage{amsmath}
\...
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1
vote
1
answer
55
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Tikz foreach draws lines from edge of nodes unexpectedly [duplicate]
Consider the following figure:
\begin{tikzpicture}[
selected/.style={circle, draw=black, fill=yellow!60, very thick},
unselected/.style={circle, draw=black, very thick}
]
\node[selected] ...
- 111
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0
answers
68
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Pascal's triangle of binomial coefficient with modulo m
I tried to modify this answer to binomial coefficient with modulo 2 using \pgfmathparse{int(mod(, 2))} but it produced lots of errors.
Package PGF Math Error: Unknown operator `=' or `=1' (in 'int(mod(...
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1
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1
answer
97
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Nested use of `\pgfmathparse` for graph drawing
I am using the trees tikzlibrary combined with some pgfmath commands to draw the ternary tree below:
To each vertex u_i, a certain v_i is associated.
So far, all of these v_i's are labelled with v_1, ...
- 55
2
votes
0
answers
38
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TikZ: Why does my pgfmath macro cause errors when used within a node's label text?
I am trying to draw a graph with labels along the edges. To do this, I'm using two foreach loops like in the following code:
\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{...
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1
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1
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99
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Having problems with drawing a modulus graph in LaTeX (overleaf)
Im asked to draw/plot the graph for the modulus function f(m) = m^7 modulo 137. I tried to do that in LaTeX with the package „pgfplots“ following the instructions from the official overleaf tutorial: ...
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1
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54
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Nested pgfmath functions give wrong value
I am trying to have a "base" common implementation of two pgfmath functions defined via \pgfmathdeclarefunction which vary only by one number. I have successfully done so and when I print ...
- 133
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0
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50
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Variable argument number in pgfmath
I am trying to understand how to define a PGF function with a variable number of arguments. Here is a minimal working example of what I am trying to do:
\documentclass{minimal}
\usepackage{pgfmath}
...
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1
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0
answers
72
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Pgfmath numerical quaternion multiplication for 3D rotation
I need to rotate coordinates in a 3D space by a certain known angle around a given axis, in order to draw solids in tikz.
One way to do this is to calculate the product p q p-1, where p is a ...
- 215
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0
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22
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How to randomly and differently select questions from their bank each compilation? [duplicate]
Following this answer, the following document, many times, doesn't change the output each time I compile it. The output may change after three or four times I recompile the document.
So, how to change ...
- 8,759
2
votes
1
answer
35
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Rounding up to decimal pgfmath
I need to define a Roundup function that is "defined as the smallest number, specified to one decimal place, that is equal to or higher than its input." For example, Round up (4.02) is 4.1; ...
- 1,955
2
votes
1
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Graph of Thomae function by an amateur
I am trying to plot the Thomae function, which is defined in the following way:
Now, I went through this answer, but unfortunately, could not grasp much. My idea is simple. Run two nested loops for ...
- 712
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1
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66
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Evaluate user defined math function
I want to "plot" a simple line function, like f(x) = 3x+5. Actually, this is perfectly working:
\documentclass{standalone}
\usepackage{pgfplots}
\begin{document}
\begin{tikzpicture}
\...
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0
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pgfplots: x vs \x
This question is a follow-up to this question ("pgfplots: Strange Bump in \tanh Function").
Stefan Pinnow, who knows a thing or two about pgfplots, provided an answer that distinguished ...
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2
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pgfplots: Strange Bump in `\tanh` Function
Follow up question see pgfplots: x vs \x.
I have a rather straightforward pgfplots diagram but I do not understand why there is a bump in my tanh function (should be smooth). The domain (and samples) ...
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1
vote
1
answer
59
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Wrong computation with PGF math
all.
I'm trying to draw an incircle to a regular pentagon. Here's my code:
\documentclass[tikz,border=1.5mm]{standalone}
\usetikzlibrary{calc, math}
\begin{document}
\begin{tikzpicture}[rotate=90]
\...
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2
votes
1
answer
57
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Trying to do simple calculation in TikZ, results in "Dimension too large." error
I am working on a pgfplot where I want to calculate some coordinate. For some reason I always get a "Dimension too large." error, but I can't figure out why since I don't understand how a ...
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1
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1
answer
443
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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(...
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votes
2
answers
62
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pgfmath: comparison of a large number of number combinations
I have a function Zstart(n, l) that outputs a start number for certain combinations (n, l) (from which on the corresponding orbitals are filled).
Everything works, but question out of interest: Can ...
- 6,217
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votes
0
answers
75
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Electron Configuration (Madelung Scheme)
I have created an electron configuration (Madelung scheme, Aufbau principle, Hund's rule) with pgfmath.
Does anyone have any suggestions for improvement or simplification?
Note: currently not ...
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2
votes
1
answer
27
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TikZ / pgfmath: dim is now issuing something else
At my TikZ (TeXLive 2020)
\documentclass[tikz]{standalone}
\begin{document}
\pgfmathprint{dim("gas")}, \pgfmathprint{dim("abcd")},
\pgfmathprint{dim("abcdefg")}
\end{...
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1
vote
2
answers
43
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writeout collapses with pgfmathprintnumber
% Density Show Test
\pgfmathdeclarefunction{DensityShowTest}{2}{%
\pgfmathparse{dim("#1")==3}%
\ifnum\pgfmathresult=1%
\pgfmathparse{1000*#2}%
\pgfmathparse{"\pgfmathprintnumber[...
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votes
1
answer
70
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pgfmath: optional argument for a pgfmathdeclarefunction
Is it possible to create an optional argument for a \pgfmathdeclarefunction?
Something like \pgfmathdeclarefunction{Plus}{2}[1.567]{\pgfmathparse{#1+#2}}, where #1 becomes 1.567 at Plus(2), but #1 ...
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2
answers
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pgfmath function that puts out a question mark in some cases
I have a pgfmath-function here, that tests whether the \Phase is equal to 'gas', then the value \Density has to be multiplicated by 1000 (else not) and that's the DensityShowTest. That works so far.
...
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votes
4
answers
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pgfmath: rounded number without pgfmathprintnumber
If I have a decimal number, say 0.09155, but I want to display a rounded version with two digits after the point: 0.09.
The standard way is to use \pgfmathprintnumber[fixed, precision=2]{0.09155}.
So ...
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vote
1
answer
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TikZ / pgfmath: pgfmathprintnumber if not a number
I need a function
1) x=-1 ---> ERROR
2) x < 0.01 --> 1000*x
3) x --> x else
The problem: The result should appear into \pgfmathprintnumber and that collapses in case 1), because the ...
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6
votes
1
answer
183
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expl3 cannot see declared functions
This question led to a new package:
pgfmath-xfp
I use tikzpicture with expl3 if floating-point computations exceed the TeX range. The problem is, expl3 cannot see declared functions, as illustrated ...
- 229
0
votes
1
answer
59
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Scale X and Y differently
I want the following three functions to be displayed, with the constant A = [1,2,4]
A*x^2*(1-x)^2
My initial MWE
\documentclass[11pt, oneside,dvipsnames]{article}
\usepackage{amsmath, amsthm, ...
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3
votes
1
answer
56
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Using pgfmath results in pgfkeys
I'm trying to create a simple variable system using pgfkeys, but I want to be able to create new "var" using other var, see this MWE where I have tried to use \pgfmathprintnumber. I thought ...
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1
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0
answers
49
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Enforcing Order of Operations on Dimension Expressions?
I'm trying to make a tikz drawing using the component lengths as macros so I can easily adjust things and have changes propagate. That works, but when I try to use division to draw lines at even ...
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1
vote
0
answers
69
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Incomplete \iffalse; all text was ignored after line ... Fatal Error when replacing value by newcommand result using pgfmathparse
When I build the following code
\documentclass{article}
\newcommand{\halve}[1]{
\pgfmathparse{int(#1 / 2))}
\pgfmathresult
}
\usepackage{tikz}
\usepackage[paperwidth=100pt, paperheight=100pt, ...
- 306
2
votes
1
answer
107
views
Which TeX graphics package is this?
I've been starting at LaTeX for a few months now and I'm learning to plot things
there. I was using Tikz and GNUPlotTex to plot some things, but the end result is
not what I would like it to be.
I was ...
- 21
0
votes
1
answer
60
views
How to draw location line and width at half maximum line in tikz/pgfplots [duplicate]
I am attempting to draw a gaussian distribution using pgfplots in tikz.
I would like to put a horizontal line illustrating the standard deviation, a horizontal line, in this example at x=0.5 - 1.5, y =...
- 165
2
votes
1
answer
97
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pgf: "Dimension too large" in a function which fits into a graph, /pgf/fpu=true does not help
I want to plot a lognormal function:
\documentclass{article}
\usepackage{pgfplots}
\begin{document}
\pgfmathdeclarefunction{lognormal}{2}{%
% \pgfkeys{/pgf/fpu=true}
\pgfmathparse{1/(x*#2*sqrt(...
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