# Questions tagged [coordinates]

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

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### 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?
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{...
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 ...
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 ...
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 ...
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 ...
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 [...
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?
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} \...
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 ...
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]{};?...
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 ...
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 ...
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 ...
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 ...
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,...
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### 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 ...
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 ...
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 ...
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 ...
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 ...
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}...
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 ...
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{...
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 ...
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 ...
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)...
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 ...
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 ...
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 ...
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 [...
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} \...
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 [...
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 ...
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); \...
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 ...
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); ...
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.
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 : ...
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 ...
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,\...
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 ...
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 ...
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[...
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### 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 ...
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 ...
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}[...
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); \...