{pgfmath} concerns the pgfmath library used for internal computations in TikZ-pgf but which is also available for other computations in (La)TeX.
3
votes
1answer
35 views
pgfmathprintnumber in bold and/or sans serif
I've set some pgfkeys such as precision=2 and use comma. Now I wonder how do I get the results of
\pgfmathprintnumber{123.567}
to be bold and/or sans serif?
I thought this is easy, but everything ...
4
votes
1answer
77 views
tikz extending spring with constant number of segments
Is there as simple way to create a pdf animation with tikz of an oscillating mass attached to a spring which extends and compresses as the mass oscillates. The number of "spring elements" should be ...
3
votes
2answers
56 views
Making a specific cell of a dynamically generated tikz matrix BOLD
I want to make specific cells of a dynamically generated tikz matrix bold. I have tried many things: \bfseries, \mathbf, \textbf, \bf, using assume math mode=false in \pgfmathprintnumberto ...
Here ...
20
votes
3answers
296 views
Why doesn't TikZ's \foreach iterate over the last element of the list?
This code
\documentclass{report}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\draw[dashed] (1,-1) -- (1,2) node[above] {$1$};
\draw[dashed] (2,-1) -- (2,2) node[above] {$2$};
\foreach ...
7
votes
3answers
103 views
Adjusting command behavior based on argument type
I have a following command in my latex document:
\newcommand{\ApplyGradient}[1]{
\pgfmathsetmacro{\PercentColor}{100.0*(#1+0.2)/1.3}
\textcolor{black!\PercentColor}{#1}}
...
13
votes
1answer
129 views
Simple example of pgfmath
I'm trying a small educational example using pgfmath. I want to calculate the minimum of a list of numbers.
More accurately, I have a list of (number,string)-pairs, and I want the minimum of all the ...
5
votes
1answer
25 views
Assign initial value to \pgfmathaccuma
I cannot assign zero initially to \pgfmathaccuma and \pgfmathaccumb. It gives this error:
! Missing number, treated as zero.
Then I press s to skip. However, \pgfmathaccumb is always empty! I want ...
2
votes
2answers
80 views
Undefined control sequence \pgfmath@
Why does the following code give me this error message?
Error
ERROR: Undefined control sequence.
--- TeX said ---
\pgfmath@dimen@ ...men@@ #1=0.0pt\relax \pgfmath@
l.28 \draw ...
6
votes
1answer
117 views
Computing value using pgfmath for use in coordinates?
Why can't I use the outcome of using pgfmath in a TikZ coordinate?
Here is a (minimal) example that does not work:
\documentclass[11pt]{article}
\usepackage{tikz}
\begin{document}
...
6
votes
4answers
457 views
Erf function in LaTeX
Is there a way to easily compute the erf function (or the cumulative distribution function of the normal law) in LaTeX?
Currently, I use pgf to make computation, but I did not find a way to compute ...
5
votes
3answers
238 views
Using mathematical function in PGF/TikZ
I want to use ProbXpos for example to position tic marks and to position line ends.
It seems to calculate as I intend, but how can I use the calculated value?
The example below prints a sample result ...
7
votes
1answer
83 views
Is it possible to store \pgfmathresult in a pgfkey?
I would like to perform a calculation using \pgfmathparse and then store \pgfmathresult as the value of a pgfkey.
\documentclass{article}
\usepackage{tikz}
\begin{document}
...
5
votes
1answer
154 views
Omit zeros before the decimal point and convert scientific notation in siunitx/pgfmath
I'm trying to automatically format numbers in a way that doesn't convert say .8 to 0.8 while at the same time scientific notation is converted to exponent-free notation. siunitx seems to be able to do ...
8
votes
1answer
232 views
TikZ \foreach loop evaluate variable using pgfmath function
I have problem with defining a new variable within the \foreach loop using the evaluate option using a pgfmath function:
\documentclass{article}
\usepackage{tikz}
\begin{document}
...
8
votes
2answers
118 views
Confusion regarding strings and numbers in tikz
I'm using a macro that uses \StrBetween from xstring
It seems to be working great.
However, when I try to use a value that it returns as a coordinate in a tikz picture, I get a confusing error.
...
4
votes
1answer
322 views
Plotting functions with parameters from an external file using gnuplot/pgfplots/pgfplotstable
If I have a table, how can I get the table values and use them as parameters for plotting in pgfplots in gnuplot? In particular, how can multiple curves be plotted with the same functional form from ...
7
votes
3answers
189 views
\uline within a pgfmath expression produces an error
Why does using \uline within a pgfmath expression result in an error?
\documentclass{article}
\usepackage[normalem]{ulem}
\usepackage{tikz}
\begin{document}
\pgfmathparse{width("\uline{blabla}")}
...
4
votes
1answer
124 views
Syntax error using PGF math function in coordinate
I would like to avoid setting too many of the values for the following picture too rigidly. For example, I would like to be able to set the position of point A and forever after that be able to ...
1
vote
0answers
76 views
Mel scale conversion in pgfmath, decimal point problem [closed]
I am trying to use pgfmath to convert frequencies in hertz to the mel scale. I'm trying to implement a formula for which I have a Java source and which I have previously implemented with success in ...
5
votes
1answer
116 views
Referencing a Vertex that has Math Typesetting inside it to make an Edge
I want to create math font inside of my vertex circles, AND draw edges between them. How I typically create network graphs is as follows:
\usepackage{tkz-graph}
\begin{tikzpicture}
...
9
votes
1answer
183 views
Macros and pgfmath within put in picture environment
I am trying to put some TikZ pictures into a Beamer slide to enhance readability. The position of the TikZ pictures on the slide will depend on how much text comes before. Since there will be many ...
6
votes
2answers
179 views
Plot x=3 in PGFPlots
I just started to use pgfplots and I'm trying to plot the line x=3 (a line parallel to the y axis where x is 3). I've tried to find an answer on the net, but all the examples always show how to ploy ...
5
votes
3answers
168 views
Correct way of test blank element in array
I'm trying to test whether an element in a defined list (array) is "empty." I tried using the \empty macro, or putting white spaces inside the quote, but nothing seems to work. I'm testing the ...
6
votes
1answer
160 views
Programming with pgf arrays : how to create an array?
I am trying to do some automatic drawing in tikz. The point is I want to be able to provide the minimal quantity of information to my macro, and still have it work.
More precisely (but without ...
7
votes
2answers
159 views
How to keep hue from going beyond 300° in xcolor/pgf? (Doing math in pgfplotstable)
Ok, this is probably an incredibly trivial question for anyone who knows more about xcolor or pgf or TikZ or whatever really. I tried to use a hue scale for a heat map/color matrix with values ...
2
votes
1answer
87 views
Use result from pgfmath with xifthen
I try to use the results of pgfmath calculations with cnttest from xifthen, but it fails:
\documentclass{article}
\usepackage{pgf,xifthen}
\begin{document}
\pgfmathparse{42+77}%
...
4
votes
1answer
81 views
Why does pgffor not calculate correctly?
I have the following problem: I want to draw some moiree effects in tikz. This seems to be no problem. I did it without any error (two circles of trapezia). Now the two rings should be moved a bit. I ...
8
votes
1answer
130 views
Arcs not being properly drawn for some special coordinates
While attempting to draw some geometry diagrams in TikZ, I was having problems drawing an arc to mark off an angle. The arc kept falling too short and would not intersect both rays of the angle. (It ...
15
votes
6answers
825 views
Random quadratic equation
I would like to produce quadratic equation with integer coefficients.
Here's my code using pgfmath.
\documentclass{article}
\usepackage{tikz}
\pgfmathsetseed{\pdfuniformdeviate 10000000}
...
3
votes
1answer
92 views
fixed leading 0's with pgfmath
I want to calculate a time being printed using pgfmath. I have some code similiar to this:
\pgfmathparse{int(mod(\x,60))}\pgfmathresult O'clock
but if the result is between 0 and 9 my time being ...
1
vote
1answer
116 views
datatool and pgfmath option [closed]
Compiling this file
\documentclass{article}
%\usepackage[math=fp]{datatool}
\usepackage[math=pgfmath]{datatool}
\DTLloaddb{scores}{sample-student-records.csv} % ...
0
votes
1answer
229 views
hyperref conflicts with todonotes and chemfig packages
I'm using TexLive 2012 from the openSUSE buildservice publishing repository, and a document that would compile with TeXLive 2011 now effects error messages such as:
Package PGF Math Error: The ...
12
votes
1answer
264 views
Why is there no pgfmath macro that expands directly to the result?
Is there a specific reason that there is no default macro (e.g. \pgfmath{<expression>}) that directly expands to the result of the evaluated <expression>? It always strikes me as ...
8
votes
3answers
159 views
pgfmath expression containing a \newtoks defined via a \def
This must be another of those expansion related issues as I don't know why the following
\def\MaxValueOfTok{8}%
\newtoks{\SomeTokDefinedViaDef}
\SomeTokDefinedViaDef={\MaxValueOfTok}
...
4
votes
2answers
189 views
How to build macros for vector-matrix operators?
Can anybody build macros for doing the following vector operations? Or are there already such macros? For example,
1) Example data: \def\a{(5,3,0)}
\def\b{(5,1,6)}
...
8
votes
1answer
309 views
pgfplot: use pgfmathdeclarefunction defined function within coordinate
This code snippet defines a simple function using \pgfmathdeclarefunction (e.g. f()) and \pgfmathparse. I would like to use the defined function f() within other coordinate, e.g. (0.2, f(0.2)) vs. ...
7
votes
1answer
108 views
Why can't I use max() here?
When I make presentations (with beamer), I like to have a bar along the bottom showing progress through the presentation visually. The interesting bit of the code below is the division on the ...
6
votes
1answer
136 views
How can I inhibit expansion through several layers of \edef?
I'm using a macro I've defined based on some suggestions here to automate the creation of tables.
For example something like
\newcommand{\clearrows}{\let\matrixcontent\empty}
...
7
votes
1answer
338 views
How to prevent small values from being plotted with nodes near coords?
I'm trying to finalize my first pgfplots chart. I've managed to get is almost the way I would like it to be with thanks to all examples I found here.
The last thing I can't seem to figure out is how ...
10
votes
3answers
1k views
\pgfmathsetmacro - dimension too large (biggest value allowed?)
I want to import some data with parameters to parametrize some plots. After importing a table, I assign specific variables of the table to a placeholder by using \pgfplotstablegetelem. And it works ...
8
votes
1answer
155 views
Unexpected results from pgfmath functions with numbers with leading 0
The pgfmath functions give me unexpected results when used on numbers with leading zeros. Are the output in the example below expected for 0011 and 0021?
\documentclass{article}
\usepackage{tikz}
...
4
votes
1answer
424 views
“Missing number” error using `\pgfmathsetmacro` with the `ifthenelse` operator
I am trying to use logical functions in pgfmath and getting unexpected errors. It seems to be related to the use of \pgfmathsetmacro, which according to my understanding should be equivalent to ...
5
votes
1answer
422 views
How to enforce printing the decimal part in pgfmath macros?
I have the opposite problem to this question. I want the decimal parts of an integer printed for consistency's sake. I already tried specifying the precision but without success. See below.
...
2
votes
0answers
48 views
custom function in pgf doesn't behave consistently [duplicate]
Possible Duplicate:
Is plotting exponential graphs a known source of bugs in TikZ?
I want to use a custom function in pgf plots and in text, like in this example:
...
3
votes
2answers
162 views
From postscript through pgfmath
I don't understand the next syntax also I would like (if possible) a traduction of the next function with pgfmath
/fct {dup 1 gt {pop 90}{dup 1 neg lt {pop 90 neg}{asin} ifelse} ifelse} def
8
votes
1answer
378 views
Using != in \pgfmathparse
In section 63.1 Operators of the pgf manual pgfmanual.pdf I see the claim that
x != y returns 1 if x ≠ y, 0 otherwise.
Unfortunately, I can't get that to work:
\documentclass{article}
...
6
votes
1answer
812 views
pgfplot consistent number format
I am trying to make a the number format in my pgfplots the same, as in the rest of my document. I am normally using the \num from the siunitx package to typeset numbers, and would like to use it in my ...
8
votes
1answer
1k views
pgfplots and calculations; without fpu 'dimension too large', with fpu 'Illegal unit of measure (pt inserted)'
I'm trying to multiply some numbers that will end up in the legend of a plot. I can't get it to work:
If I naively try \pgfmathmultiply, I get a dimension too large error, with the code in MWE 1 ...
13
votes
3answers
380 views
How to find the length of a PGF array?
A few of my macros currently require the user to pass the length of an array along with the array itself. It would be nice if the length could be calculated for them, as the user in question (myself) ...
3
votes
2answers
336 views
Can one pass a pgf array to a pgf math function?
I'd like to define:
anglearray(\A,\I,\L) = array(\A,Mod(\I,\L)) + 360*floor((\I+0.1)/\L);
but I get strange errors about "! Missing number, treated as zero." and the "array" part appears to ...
