Questions tagged [coordinates]

{coordinates} is about using coordinates in {diagrams}.

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78
votes
4answers
74k views

TikZ: difference between \node and \coordinate?

What is the difference between \node and \coordinate in TikZ? Exchanging them does no visual effect in my (to be honest: still simple) pictures. When to use what?
34
votes
2answers
21k views

Problems with TikZ calculations

When can I use functions and do calculations in TikZ? How do I make this work: \draw (0,0) arc(0:90:sqrt(15)); %not ok why is this working: \draw (0,0) arc(0:asin(1):5); %ok with \usetikzlibrary{...
33
votes
2answers
11k views

How can I compute the distance between two coordinates in TikZ?

Given two points (defined, for instance using nodes), I want to compute the distance between them. Is there some build in functionality in tikz to do this? If not, how can it be done using the ...
25
votes
2answers
3k views

Accessing the logic values of a TikZ coordinate

In TikZ accessing the coordinate values of a node can be done using the let syntax of the calc library or using the PGF command \pgfpointanchor. However, this values are dimensions/lengths in points ...
24
votes
3answers
11k views

Transforming coordinates, so (0,0) from tikzpicture is put in the desired place of the page

In tikz I can perform absolute positioning, e.g. (current page.center), but how I can specify/transform the coordinates, so (0,0) within tikzpicture will end in well-defined place like center of the ...
23
votes
3answers
11k views

How to draw a coordinate system with LaTeX?

I want to draw a coordinate system like this: I would like to specify the width and height of the coordinate system and where the origin begins (upper left corner). I also want to specify the x and y ...
23
votes
3answers
11k views

extract x value from coordinate in TikZ

maybe I'm stupid, I looked at the many examples in which somehow shows the work with the coordinates, but I don't understand it. Simple example - I have: \begin{tikzpicture} \coordinate [...
23
votes
1answer
6k views

How can I express half the distance between two nodes?

I want to draw a line from node A half-way to node B in TiKZ. How can I find express the end point?
22
votes
2answers
16k views

Using TikZ coordinates in expressions?

I would like to be able to calculate two new \coordinates by starting from two existing coordinates. I have defined two coordinates c1 and c2. A minimal example would be \documentclass{report} \...
21
votes
8answers
11k views

Transform defined coordinates in TikZ

Say I have a triangle with vertices defined using \coordinate (a) at (0,0); \coordinate (b) at (1,0); \coordinate (c) at (0,1); Let us denote by T(x,y) the triangle defined by (a),(b) and (c) which ...
21
votes
1answer
15k views

How to specify a Tikz coordinate relative to a node?

is there a simple idiom (one not using the calc library) to specify a Tikz coordinate relative to a node? Something like \coordinate (x) [right=of A]; instead of \node (x) [draw=none, right=of A]{};?...
20
votes
2answers
4k views

Can LaTeX place text by mm coordinates?

My system generates LaTex letters and templates; however, my client has to fill out pre-built forms that they have no control over. I'd like to fill out these forms by measuring the coordinates in mm ...
18
votes
3answers
9k views

Draw in cylindrical and spherical coordinates

I can try to draw this in TikZ: I managed to draw the coordinate axis. The first image is in cylindrical coordinates and the second in spherical coordinates. I don't know draw in spherical coordinate ...
16
votes
2answers
1k views

Is there a better way to do intersections and calculations with relative coordinates in TikZ?

I've been doing many TikZ diagrams lately and every so often I encounter a situation where I am forced to use some temporary coordinate in a \path. In the following short example, the problem is ...
14
votes
4answers
516 views

How to create a macro with two or three ;-separated arguments?

I want to create in 2D a point with \defpoint(1;2){A} and in 3D with \defpoint(1;2;-5){A}. I prefer a solution with TeX but it would be interesting to see if LaTeX3 is useful in this situation. I ...
14
votes
4answers
2k views

Storing and re-using tikz coordinates for position and tangent vectors

The following code \documentclass[border=5pt]{standalone} \usepackage{tikz} \usepackage{pgfplots} \pgfplotsset{compat=1.11} \usetikzlibrary{arrows,backgrounds,patterns,shapes.geometric,calc,...
14
votes
2answers
1k views

Computed coordinates are all the same?

It's embarrassing question time. Why are my computed coordinates all showing up at the same location? The larger filled quarter circles are drawn with: current page.\x where \x is south west, north ...
14
votes
1answer
6k views

tikz: placing nodes relative to the bounding box coordinates

I have a tikzpicture,in this case a blue rectangle, that will produce a bounding box, here visualized by the green background. I would now like to place a node in the top left corner of the bounding ...
14
votes
1answer
4k views

pgfplots - Placing Nodes on x Coordinates of a Plot

I want to plot some graphs in pgfplots and want to place nodes on the exact same x coordinate of the plot. The position of the note has to be set in x direction but free in y direction. Here is one ...
13
votes
2answers
1k views

How can I do an affine coordinate transformation in pgfplots?

It is possible to perform a general affine coordinate transformation in TikZ by combining the shift, x, and y keys (or just the generalized cm key to set the coordinate matrix and shift). This allows ...
12
votes
1answer
5k views

How to draw and annotate a spherical coordinate system

For some lecture script I am preparing I would need some descriptive images showing how to work with spherical coordinates as often seen in textbooks, i.e. a globe and some descriptive arrows ...
12
votes
2answers
984 views

Relative coordinates in PSTricks

TikZ gives us the ease of using relative coordinates, like in the following example. \documentclass[border=3mm]{standalone} \usepackage{tikz} \usetikzlibrary{calc} \begin{document} \begin{tikzpicture}...
11
votes
5answers
2k views

automatic tikz coordinate calculations

Right now I have these defined: \coordinate (Z1) at (0.9,0.5); \coordinate (Z2) at (0.816,-0.112); \coordinate (Z3) at (0.46848,-0.46336); But I would really like to automate this to be: so that I ...
11
votes
4answers
693 views

Can tikz coordinates be exported to a text-file?

Can tikz coordinates be exported to a text file, while the document is rendered? Let the document be: \documentclass{scrartcl} \usepackage{tikz} \usetikzlibrary{calc} \begin{document} \begin{...
11
votes
3answers
11k views

Tikz: Placing a node relative to the (rectangular) coordinates of another

How do I place one node relative to the coordinates of another? In theory: \begin{tikzpicture} \node (source) {X}; \node (destn) {Y} at source.coordinates +(2,1); \end{tikzpicture} would ...
11
votes
2answers
5k views

Coordinates A, B: compute |B-A| and angle between +x and (B-A)

This question has two parts: why is the angle computed always 0 (should be 45) what is a straightforward way to compute distance between coordinates (there is How can I compute the distance between ...
11
votes
1answer
1k views

Curve synthesis - Adding two curves to get another one

Case 1: Let's say I have a few coordinates (A), (B), (C), (W), (X), (Y), and (Z) (possibily obtained through intersection, rotation, and whatnots). I draw two piecewise linear curves through (A), (B)...
11
votes
1answer
922 views

normal coordinate system in tikz using parallel curves

I have a wavey looking curve and would like to show the corresponding normal coordinate system, which is defined by arclength along the curve and (signed) distance from the curve. So there should be ...
10
votes
3answers
1k views

3D Cartesian Coordinate System

I want to modify my three-dimensional Cartesian coordinate system as shown in the picture attached. I would like to have numbers under my ticks. I want parts of the grid to be parallel to the x_1 ...
10
votes
2answers
23k views

Tikz coordinate calculation

Consider the followinting tikz picture. I need to place the segment re-D so that its measure will be 8/9ths the measure of the segment ut-C. Now I just placed it at a random distance of 8/9 between ut ...
10
votes
1answer
7k views

How to position one node relative to another node at a certain angle in TikZ taking the nodes' size into account?

I asked a question before about how to position a node relative to another node at a certain angle in TikZ, and the answer I got there was that you can use the \path (node1) ++(angle:distance) node [...
9
votes
2answers
190 views

TikZ fill not being drawn using named coordinates

Is this a bug in TikZ? I'm working on an assignment which includes a number of colorful graphics, and for some reason the following code doesn't quite work as expected: \RequirePackage{luatex85} \...
8
votes
3answers
642 views

Draw curve in same curve small

I want two make same space between two smooth curves \documentclass[12pt]{article} \usepackage{tikz} \usetikzlibrary{calc} \begin{document} \begin{tikzpicture} \coordinate (O) at (0,0); \draw [...
8
votes
3answers
300 views

Combining calc and perpendicular coordinates in tikz

As it is described there, the following does not compile: \documentclass{report} \usepackage{tikz} \usetikzlibrary{calc} \begin{document} \begin{tikzpicture} \node at (0, 0) (node1) {Hello}; \node ...
8
votes
2answers
455 views

How to iteratively define coordinates in TikZ?

I'm attempting to iteratively define a coordinate system in TikZ. Essentially, I'd want to replicate the following using a \foreach command: \begin{tikzpicture} \coordinate (A1) at (0,0); \...
8
votes
1answer
598 views

Pass a 3d coordinate via pgfkeys

I'm using 3dplot to draw in 3D. Now I want to define my own environment, called pose, that is supposed to be used inside a tikzpicture-environment. It should perform a coordinate system tansformation ...
8
votes
1answer
528 views

Create a coordinate node at each point of a path

How can I create a TikZ/pgf-style that will put a coordinate, which should be named automatically, at each point of a path? So the following code \draw[put coordinates](0,0)--(3,2)--(4,7)--(-2,1); ...
8
votes
1answer
6k views

How do I set top left position as the anchor for a node (TikZ)

Is there a way to position a node in terms of left/right coordinates of bounding rectangle? It appears to me that I can only specify center position.
8
votes
1answer
2k views

Specify x and y in different coordinate systems in pgfplots similar to gnuplot

In gnuplot you can specify positions in several coordinate systems: First, Second, Graph, Screen, Character. What are the equivalents in pgfplots? I know the following: First : axis cs: Second : ...
7
votes
2answers
858 views

drawing smooth path through symmetric points, gives non symmetric curve

I want to make a graphic going through some points. I've choose the points symmetric, to have a symmetric curve, but the curve is not. I could define some extra points, but their must be a better ...
7
votes
3answers
743 views

Global Coordinates

How can I declare coordinates in a block and access them from outside of the block? \begin{tikzpicture} \foreach \x / \y in { 1 / 3, 2 / 8, 3 / 14, }{ \coordinate (N\x) at (\x,\...
7
votes
2answers
371 views

Coordinate system along line

I would like to draw a coordinate system along some lines in a framework for a structural course. This little coordinate system is called local coordinate system. At the moment the framework looks ...
7
votes
2answers
2k views

Transforming “rel axis cs” to absolute coordinates?

I've got two plots arranged vertically using \matrix. I'd like to draw a vertical line, that spans over both plots with a margin of 1cm at the top and at the bottom. The starting point of the line ...
7
votes
2answers
603 views

How to get a reasonable coordinate system when combining pdfpages and TikZ?

I have been trying to add content to a (proprietary) PDF with LaTeX by using pdfpages to inlude the original pages and draw on them using TikZ. This is the code I have been using: \documentclass[...
7
votes
1answer
1k views

TikZ change coordinate system so Y points downwards

How can I change the default coordinate system of TikZ, so the Y coordinates go downwards, instead of upwards. This is because in the picture I'm trying to draw it is more natural to reference points ...
7
votes
1answer
2k views

Wrong point when barycentric coordinates in triangle add up to one

I am trying to plot points on a triangle using areal coordinates (barycentric coordinates that add up to one). Using TikZ and the barycentric coordinate system, however, this gives the wrong point in ...
7
votes
1answer
5k views

How to create symbolic x coords without losing last bar

I've created a bar chart with labels for the x coordinates. But if I don't put a xmin/xmax in, only half of the first and last bar appear. If I add a xmax it shows up on the axis. \begin{figure}[...
7
votes
1answer
498 views

Using vectors in TikZ?

Is there a way to define vectors in TikZ? By that I mean the ability to add and scalar multiply coordinate tuples, for example for drawing a parallelogram: % Just pseudocode: P := (0,1); Q := (1,1); \...
7
votes
1answer
1k views

Placing node at path using `midway` in pgfplots

I thought my problem would have been possibly answered anywhere here, but I could not get it to work. Questions I consider linked to mine but which weren´t able to solve my issue are node placement ...
7
votes
1answer
3k views

Help understanding the coordinate system used in tikz

I'm trying to understand how the coordinate system work for drawing pictures with tikz. I'm a little lost... Here is a MWE that shows of some example code: \documentstyle{article} \begin{document} ...