Questions tagged [pgfmathparse]
The pgfmathparse tag has no usage guidance.
35
questions
4
votes
1answer
64 views
How to detect if expansion takes place while evaluating a \pgfmathparse-expression/if inside a \pgfmathparse-expression?
I intend to write a macro which behaves differently depending on whether used within a \pgfmathparse-expression or used outside a \pgfmathparse-expression.
For example a commend \MyNicePi which ...
0
votes
3answers
60 views
pgfmath gives me a wrong computation
I am trying to do some plots with spherical coordinates and have a problem when computing some numbers in PGFPLOTS.
I add a MWE here:
\documentclass[12pt]{standalone}
\usepackage[pdftex]{graphicx}
\...
4
votes
1answer
66 views
TikZ: How to create a list with calculated entries for a style
I have a TikZ-matrix. And I want to highlight the rows
1, 3, 6, 10, 15, 21, 28,... =n*(n+1)/2
For small examples, I could do it this way:
highlight/.style={ row #1/.style={....} },
highlight/.list=...
0
votes
1answer
25 views
pgfmathmin and pgfmathsetmacro and array
I am trying to calculate the minimum and maximum of an array. The only problem unsolved is to save the value in a macro/variable.
\documentclass[utf8,fleqn]{scrartcl}
\usepackage[ngerman]{babel}
\...
0
votes
1answer
89 views
Format \pgfmathresult with \pgfmathprintnumber and using it in \TextField
I want to use \pgfmathprintnumber to format the \pgfmathresult but without printing it because I want to then use it in a \TextField as value that does not accept \pgfmathprintnumber for some ...
5
votes
2answers
272 views
TikZ: Get (dimensionless) distance between node anchors
In the following picture I want node C to be as wide as the distance between (A.north east) and (B.south west) as indicated in the picture; I tried defining a new node D with \n1 as minimum width, and ...
3
votes
1answer
62 views
Reserved names in “declare function”?
This must be my week for stepping on reserved words... please look at this MWE:
\documentclass{article}
\usepackage{tikz}
\newcommand{\formula}[1]{%
\pgfmathsetmacro{\rpval}{#1}%
\...
4
votes
2answers
63 views
Change font size in a section as a function of the current font size
This answer shows how to get the current font size, using \makeatletter\f@size\makeatother.
This answer shows how to parse and evaluate a mathematical expression before printing it, using for example ...
1
vote
1answer
102 views
Pgfplots and pgfmathparse, lack of precision
I am using pgfplots to draw a graph and I would like to modify the abscissa values of the data when they are plotted. I am currently using x filter/.code={\pgfmathparse{1/#1} \pgfmathresult} to take ...
2
votes
1answer
92 views
Counter does not work properly in \pgfmathparse
I have this code:
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\usepackage{pgfplots}
\usepackage{tikz}
\pgfplotsset{compat=1.15}
\usetikzlibrary{patterns}
\newcounter{...
3
votes
1answer
63 views
circuitikz: setting color using \pgfmathparse
\documentclass[a4paper]{article}
\usepackage{tikz}
\usepackage{circuitikz} \usetikzlibrary{shapes.geometric,arrows,shapes,decorations.markings} \begin{document}
\begin{circuitikz} [american ...
1
vote
1answer
71 views
Defining math functions
\documentclass[aspectratio=1610]{beamer}
\usepackage{amsmath}
\begin{document}
\def\function(#1){ 96* (#1)-16 *(#1)^2 }
%1. I am trying to condense the following two lines
\pgfmathparse{3+\...
1
vote
1answer
426 views
Stacked bar chart, nodes near coords remove small values and show sum
I know it is possible to have only the sum shown on top of the bar chart and remove the other values in the stacked bar chart (as shown in picture attached), but I can't figure out what went wrong in ...
1
vote
2answers
272 views
pgfmath: Function for strings and numbers?
Is there a pgfmath-function for something like
?
\documentclass[]{article}
\usepackage{tikz}
\usepackage{array}
\begin{document}
\def\myarray{{1,0,"-1","a"}}
\foreach \i in {0,...,3}{\pgfmathparse{\...
3
votes
1answer
130 views
\pgfmathsetmacro creates “Dimensions too large” for t distribution
I am trying to plot 't' distribution with area of interest shaded. I have done both plotting and sharing area. Next tried to draw vertical lines closing the shaded area on both sides. For this, I need ...
2
votes
1answer
69 views
Problem with `\pgfmathresult pt = 1 pt` when forming xticklabel (very large values)
I'm having difficulties with the comparison \pgfmathresult pt = 1 pt . A complete example, with a situation in which it works, and a second one that doesn't (both in the x-axis):
\documentclass{...
3
votes
1answer
177 views
TikZ PGF - Minus sign being interpreted as a unit of measure
I'm trying to write a macro that draws a number line given a number of tick marks to use. However, there are a couple of spots in the code where I try to do arithmetic using the argument of the ...
5
votes
2answers
294 views
Coordinate calculation with TikZ
I need to draw some plots with vertical lines from the x axis to the function. For example, I defined the gauss(x) function for the normal distribution and I drew this plot, with a vertical line from (...
0
votes
1answer
605 views
! TeX capacity exceeded, sorry [main memory size=5000000]. for foreach
I was blocked on this point, I'm going to compile a code in which I'm using the command foreach:
\pgfmathtruncatemacro{\iar}{{\RodLength*\iBngle/180}}%L=\iBngle*x=\RodLength*\iBngle/360%360 ou 180 ...
0
votes
2answers
205 views
Error trying to parse with \pgfmathparse
I'm trying to evaluate the following expression with \pgfmathparse, but I get error messages:
\pgfmathparse{\sqrt{{5.8186/{\pi}}}}\pgfmathresult\
Any idea why?
2
votes
0answers
167 views
Calling pgf rand inside pgfmathsetmacro creates extra text
I am using pgf and tikz for some latex questions. The code below illustrates a problem I am facing: when I use the rand function from pgf inside a pgfmathsetmacro I get some extra text at the ...
6
votes
2answers
1k views
How to Draw Horizontal Line in tikzpicture
I am trying to draw a dotted line from a defined function value to the x-axis in order to "close off" a shaded area below the curve. Because I defined a function in order to be plotted, I don't know ...
2
votes
1answer
200 views
Computing color for a mesh using the parametric coordinates
Question: Is there a way to use the parametric parameters (instead of the absolute x and y) inside the mathparse used to calculate the color of a surf?
Motivation: The function I have to plot has a ...
4
votes
3answers
2k views
pgfmathparse in foreach, use result as node coordinates
I'm trying to use a counter inside a TikZ picture, and use values resulting on calculations with this counter. Let's say for instance, I want i to be ranging from 0 to 9, j to be i*5 and k to be i*10. ...
2
votes
1answer
269 views
Drawing a graph with pgfmathparse+matrix
I want to draw a graph. I use tikz matrix to draw the vertices, and then would like to add edges from an array. I tried the following code:
\documentclass{article}
\usepackage{tikz,pgfmath}
\...
8
votes
3answers
330 views
pgfmathparse does not correctly parse zero left-padded integers?
I am currently trying to realize a slightly complicated graphic, wherein I have a bunch files all named with the value of a certain parameter, represented by its left-padded value. Namely, I have:
...
5
votes
2answers
477 views
For each loop showing decimal point when I don't want it to
My Code is:
\documentclass[tikz,border=10pt]{standalone}
\begin{document}
\begin{tikzpicture}[timeSlot/.style={draw, rectangle, minimum size =1cm}]
\foreach [count=\x] [evaluate=\x as \xx ...
10
votes
2answers
11k views
pgfmathparse basic usage
Please, what I'm doing wrong in this test:
\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\pgfmathparse{10*2}
\node at (4,-5) {$2 \cdot 10 = \pgfmathresult$};
\end{...
2
votes
1answer
238 views
How to calculate many coordinates inside pgfplots axis in a clever way?
What I want is
which could be drawn by the following code.
\documentclass{article}
\usepackage{pgfplots}
\pgfplotsset{compat=1.13}
\begin{document}
\begin{tikzpicture}
\begin{axis}[xmin=...
1
vote
1answer
224 views
Why is this small example not working any more when using pgfmathparse?
The following small example worked until \pgfmathparse{\myvalue+1}\pgfmathresult was added instead of just 1. I am not getting any error message, the compiling process just doesn't end. This is the ...
2
votes
1answer
182 views
Math with TikZ Strange Behaviour
I am working on a Tikz figure, which uses the sin and cos functions.
Currently I use a Python script to compute the six function parameters, which are given to the Tikz "g" function, as shown below:
\...
1
vote
0answers
147 views
pgfplots: Problem with ticks in logarithmic scale - math parse error [closed]
Why do I get the error
! Package PGF Math Error: Could not parse input '0.005,0.0005' as a floating po
int number, sorry. The unreadable part was near ',0.0005'..
when pdflatexing the following ...
3
votes
1answer
384 views
Parsing input for table automatically generated from csv file
I have a .csv file which looks like:
{one},{two},{three}
11/07/2014,14:49:54,(100,100)
2,2,2
I have some code which creates a table from the .csv file.
\documentclass{article}
\usepackage{...
4
votes
1answer
432 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 ...
10
votes
2answers
3k views
\ifthenelse with inequalities and expressions, using \pgfmathparse
I'm trying to write a function that draws a matrix with a some ones (in black) and zeros (white) in it with a certain pattern to the distribution of ones and zeros. I want to draw ones, only if they ...
