{calculations} is about calculations in (La)TeX documents. A popular package is calc although may other also exist (fp, pgf, and LaTeX3 packages).

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5
votes
1answer
86 views

Numeric variable in LaTeX

I have been given the task of creating a LaTeX template for producing marking reports for student research proposals. We need an easy way to assign marks (numeric values) to particular qualities of ...
4
votes
1answer
61 views

Calculation of an absolute position

My question is about calculating with the package textpos. By saving the vertical position of a block of text with zsavepos and calculating the middle of it, I want to position a block of text at the ...
2
votes
1answer
64 views

Time calculations

Based on a given starting time, I'd like to automatically calculate a time table. Based on https://groups.google.com/forum/#!topic/de.comp.text.tex/BQrRUYmDrHw I put the following MWE together: ...
5
votes
2answers
216 views

Do multiplication rules differ in TikZ compared to standard TeX?

I'd like to scale a line according to \figscale. Here it is said that the below syntax should work in general, but in this graphic it does not. As the picture shows, the numbers are just concatenated ...
2
votes
1answer
43 views

Building evaluated arrays

I'm trying to build an array dynamically in latex then use it in tikz. I'm a little confused about how to create an array and add evaluated mathematical expressions to it (I'm trying arrayjob). ...
2
votes
1answer
34 views

\widthof text in a def'd subroutine inside a tikzpicture? [duplicate]

I have already seen \widthof within tikzpicture, but this is slightly different. I have a rather complex Tikz image, which I'd like to eventually include in a Latex document; as such, I'd like this ...
2
votes
2answers
66 views

Automate a running counter through a document

The following minimal example demonstrates my situation: \documentclass{article} \usepackage{calculator} \newcommand{\pts}{0} \begin{document} \ADD{\pts}{3}{\pts}\pts \ADD{\pts}{3}{\pts}\pts ...
2
votes
1answer
44 views

Using a fp variable in a longtabu header

So, I am using the tabu package (which I need to use over tabular others for several reasons) to make a long table spanning several pages. This table contains currency amounts in a column, and I'd ...
3
votes
3answers
186 views

Summation of a list of numbers

The next code gives : 1 1.2 3 But 1 2.2 5.2 is expected. What is wrong ? \documentclass[tikz]{standalone} \begin{document} \xdef\Sum{0} \foreach \i in {1,1.2,3} { \pgfmathsetmacro\Sum{\Sum+\i} ...
4
votes
1answer
116 views

How to use margins in calculations?

I'd like to have a rule that has for example the width of \paperwidth-\leftmargin-\rightmargin. I tried to use \dimexpr, but apparently I do something wrong, because it does not work. ...
2
votes
4answers
92 views

Define variables holding a percentage

I would like to define some variables in a tex document. For example, I write in .tex something similar as: Our tool succeeds to validate x samples out of all the y samples, thus its success ratio is ...
15
votes
5answers
592 views

command for floor

I need something that corresponds to floor() to use it in a macro (I don't mean the notation, I really mean the function that rounds downwards). Something like this: \floor{34.75} produces 34 ...
1
vote
1answer
43 views

longtabu: put running total of some columns under the header on each page

so, I have a longtabu table spanning several pages. The table has a header, that needs to be repeated on each page. Some of the columns are numerical amounts, and I would like to put a row presenting ...
5
votes
1answer
67 views

Stretching an \fbox horizontally to fit the page

I have a frame box next to some text (Komentar:), and I would like to stretch it so it fills up the page. I've done this using the calc package by subtracting \widthof{Komentar: } from \hsize (or ...
1
vote
1answer
82 views

Tikz: How to combine orthogonal edge syntax with coordinate calculation? [duplicate]

I'm trying to combine the syntax for orthogonal edges (p |- q) with the syntax for calculation relative coordinates ($ (a) + (1,0) $). Example: \draw ($ (node1.south) + (1,0) $) to ( ($ (node1.south) ...
6
votes
1answer
95 views

Add (n) working days to a specific date

My g-brief will contain something like "I have noted a deadline for your answer of ten working days until...". Is there a package or way to add n working-days (ie. mon-fri, let's not over complicate ...
2
votes
1answer
90 views

How to get float numbers as parameter of \newcommand

I have defined a \newcommand function like into this code: \documentclass{scrartcl} \usepackage{pbox,calc} \newcounter{pointsExo} \setcounter{pointsExo}{4} \newcounter{pointsSousTotal} ...
5
votes
1answer
102 views

Resize tikzfigure in tcolorbox depending on height of tcolorbox

in my book I got many different type of boxes so I made some macros placing the boxes automatically according to their arguments. That's one of them. So far I made some boxes that have big "+" and ...
10
votes
3answers
722 views

TikZ coding style

I've got a piece of TikZ code here and since I am only starting to learn how to use it, I wanted to ask whether this code would be regarded to be ok or rather completely unreadable and what I can do ...
10
votes
1answer
168 views

Floating point and fixed point arithmetic in LaTeX3: Where documented? Safe to use?

Since about twenty years, I use a private fixed point arithmetic package which I would like to replace by something newer and better. There is the equally old (but good) fp package, but LaTeX3 is ...
12
votes
3answers
342 views

Formatting numbers while printing

Is there a way to format number strings while printing? Suppose I have the following declaration: \newcommand{\MyNumberA}{40} \newcommand{\MyNumberB}{60} The following in the text: ...
4
votes
1answer
80 views

How do I do currency calculations in text?

I am writing a long document, which has a lot of money references in Indian rupees (easily typeset using package tfrupee). Some definitions peculiar to Indian money before we proceed: Its grouped ...
2
votes
0answers
67 views

Perform spreadsheet-like calculations and display formula and result

Currently I am performing calculations using excel and manually formatting them for printing using an online LaTeX equation editor. The end result looks something like this: As you may imagine this ...
6
votes
1answer
74 views

Dynamic calculation within regular expression quantifier in LaTeX3's l3regex package

I am trying to do some simple calculations to be applied to a regular expression quantifier used in l3regex's \regex_replace_all:nnN function. I've built my code around what I found here: Defining a ...
1
vote
1answer
85 views

Effect of adding plus and minus to \includegraphics

I have a document with a lot of pictures. The exact scale of the pictures isn't all that important. Is it possible to allow the pictures a little bit of "stretch" to help squeeze everything together? ...
3
votes
2answers
116 views

Perform simple calculations on user-defined variables

In my document, I have a user-defined variable like: \newcommand{\MyNumber}{30} Suppose, if I want to use a derivative of \MyNumber, it could be \MyNumber+10, 100-\MyNumber, 5*\MyNumber of ...
2
votes
1answer
67 views

Apply shift to (current axis.left of origin)

I was trying to improve the solution at Drawing lines in a plot and give them a label? by using Jake's answer at How to access \xmin, \xmax, \ymin, \ymax from within PGFplots axis environment. So, ...
5
votes
2answers
137 views

Is it possible to extrapolate data for a 3d-plot in pgfplots?

I am having several measurements to plot and would like to use something like a 3d surface from pgfplots. I am having a frame as outer border and a grid as measurement raster. The measured values are ...
13
votes
5answers
387 views

Transform big number into scientific format

I want to convert my big integer number into a shorter form; for example \convert{123456789} = 1.23 x 10^9 Is there any package which allows me to do so?
2
votes
3answers
121 views

Efficient way to indicate steps in a derivation

Imagine you're writing up a long derivation, and sometimes, the step to go from one equality to the next is nonobvious (for example, maybe it requires application of a theorem). In such cases, you ...
4
votes
1answer
105 views

Calculating averages and more

I am translating a Word document into LaTeX as a learning experience. Now there is this table, that already has hard-coded values. However, I would like to have it generic, so that changing a single ...
11
votes
2answers
262 views

Factorial (or, even better, binomial coefficient) function

Is there a function in l3fp for calculating factorials or, even better, binomial coefficients directly?
11
votes
4answers
264 views

Calculations in TikZ for iterative procedure

In many \foreach iterative procedures in TikZ I would like to relate the generic node called n\x -- where x is a natural number -- to another node the name of which is obtained by applying basic ...
3
votes
2answers
85 views

How to calculate number of symbols in chapter heading?

Is there a simple way to calculate number of symbols in headings? I'm planning to change color and size of every even to red 16pt and every odd to blue 10pt. Like this one made in word: Or maybe ...
3
votes
2answers
55 views

identify pieces of text automatically generated from input and new command

I have a document where many of its values are defined in a separate file via \newcommand, and added to the main document using \input in the preamble. The file being included is the output of a ...
0
votes
0answers
65 views

Software/Programm: latex-based math trainer

I need some help, because I searched the internet for quite a long time, but I wasn't successfull in getting a solution: I'm looking for a program/software, which helps me to practice math, which is ...
1
vote
1answer
71 views

How do I store the x or y value of a named node in tikz \draw?

A big part of the question above has already been answered: "Use the calc tikzlibrary and the let syntax". \begin{tikzpicture} \draw [help lines] (0,0) grid (4,4); \node (A) at (2,1) {A}; ...
3
votes
1answer
136 views

fp calculation variable

I want to do some calculations in a LaTeX document; the result of the first is used in the next calculation. I figured out that the fp package should do the job. Here is an example: ...
4
votes
2answers
124 views

How to calculate a new length?

What I want to do is calculate the actual size between the edge of the paper, and my header. \evenmarginsize and \oddmarginsize do not do this. \settowidth{\msize}{((\paperwidth - \textwidth)/2)} ...
3
votes
1answer
120 views

A problem with underfull \hbox in alignment (tabular*) and/or perhaps the calc package

I am getting an underfull \hbox in alignment (badness 10000) with tabular*. The warning goes away if I adjust the table width by 0.00002pt (as per the MWE below). The difference seems to arise ...
52
votes
11answers
2k views

How can I define a mathematical function as a LaTeX macro?

I am attempting to create a usable function within LaTeX such that its inputs are transformed mathematically. However, I cannot find any documentation that can perform such mathematical function ...
2
votes
1answer
158 views

How to calculate intersections of a line defined by a segment and an ellipse in tikz

EDIT Here's what I intended to ask, but didn't clearly formulate initially. The Tikz package intersections allows one to calculate and manipulate the intersection point of two non-parallel lines ...
17
votes
4answers
337 views

How can I convert units in LaTeX environment?

Example: \usepackage{siunitx} \newcommand{\temperature}[1]{\SI{#1}{\celsius}} \temperature{100} output: 100°C I would like something like: \newcommand{\temperature}[1]{\SI{#1+273}{\kelvin} ...
6
votes
1answer
155 views

Multiplication to macro argument

Since the baselineskip parameter for fontsize should better be 1.2 times of the font size, I'd like to define a macro which accepts only one argument and deduces the baselineskip from the font size. ...
4
votes
1answer
488 views

Usage of the \dimexpr command

I have MiKTeX 2.3 and its version of e-TeX does not support \dimexpr command. I do not want to update this MiKTeX now and wonder, is it possible to define the \dimexpr command, probably with use of ...
2
votes
0answers
63 views

TikZ Dimension too large Matrix Transform

I'm working on some matrix transformation code, and I keep getting ! Dimension too large. I traced it down to the following simple example. The problem does not occur when 2e-17 is replaced with ...
3
votes
1answer
124 views

Applying Matrix Operation Code

I'm (relatively) new to LaTeX, and I'm having a syntactic problem using the wonderful code here, which allows arbitrary matrix operations in LaTeX. I wrote a macro to generate certain matrices. ...
5
votes
1answer
137 views

Why doesn't the calc package work?

I'm trying to span two column in table (using xtabular) by the following command: \multicolumn{2}{|p{(\linewidth-\tabcolsep*2-\arrayrulewidth*1)*2/2}|} The package calc must calculate this ...
8
votes
1answer
315 views

Rotate a path around a point

I have a named path (a triangle). How do I rotate it around point A in various angles without recalculating points B & C? Here's my code. I want to create the red and green triangles by simply ...
6
votes
1answer
231 views

Expand macro in Latex

I have a pretty simple problem but have been unable to look for a simple answer. It's about macro expansion. Let's say I define 4 symbols: \documentclass{minimal} \newcommand* \A {1} \newcommand* ...