Accessing element in coordinate

Question

I have a list of coordinates defined in a loop. For every coordinate, I would like to draw two circles just off the coordinate. So if my chosen coordinate were A = (x0,y0), it would look like this:

\draw[fill] ({x0-.1*cos(30)}, {y0-.1*sin(30)} ) circle[radius=.1cm]

\draw[fill] ({x0+.1*cos(30)}, {y0+.1*sin(30)} ) circle[radius=.1cm]

But I don't know how to access x0 or y0 (i.e. in python I would write A[0] and A[1]). Hope it makes sense.

Welcome to TeX.SX! Please help us help you and add a minimal working example (MWE) that illustrates your problem. Reproducing the problem and finding out what the issue is will be much easier when we see compilable code, starting with \documentclass{...} and ending with \end{document}. — DG', May 19 '22 at 08:12
This looks a lot like this question Could one of the answers there be useful to you? — Miyase, May 19 '22 at 08:17
Yes, thank you! One of those answers was exactly what I was looking for! — igunnarsson, May 19 '22 at 08:26

score 0 · Accepted Answer · answered May 19 '22 at 08:21

0

Your question is very light on details (and in particular a MWE), so I must assume that this is what you mean:

\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
  \coordinate (A) at (1,2);
  \draw[fill] (A) ++({-.1*cos(30)},{-.1*sin(30)}) circle[radius=.1cm];
  \draw[fill] (A) ++({+.1*cos(30)},{+.1*sin(30)}) circle[radius=.1cm];
\end{tikzpicture}
\end{document}

answered May 19 '22 at 08:21

Henri Menke

109,596

Yes that's precisely what I meant. Thank you!! – igunnarsson May 19 '22 at 08:26

Accessing element in coordinate

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