Create a chain of circle around a large circle using TikZ (and how I could learn to create this)

tikz-pgf

So I have two questions. First, how could I create the following image in TikZ? Secondly, what resources could I use to learn the TikZ to make this on my own and also how can I understand your code (if you could explain it that would be so much appreciated 🙂 )

Also how do I input an image into this. I tried and it said it was too big but this doesn't make sense as it's a simple image of a piece of graph paper. It also said failed when I tried to insert the imgur link into the box.

Any help appreciated thanks so much!

Best Answer

For the first answer, the TikZ documentation could be a good starting point, specially the Tutorials section. The link in the comments provides a lot of interesting resources too. And there are lots of examples across this site, varying from the very simple to the very difficult.

The second: the picture. You can do it with this simple code:

\documentclass[border=2mm,tikz]{standalone}

\begin{document}
\begin{tikzpicture}
\def\R{3}   % Table radius
\def\r{0.5} % Seat radius
% Title
\node at (0,\R+1) {\Large Seats in a round table};
% Table
\draw[thick,fill=brown!30] (0,0) circle (\R);
% Seats (change the number 180 to rotate the seats)
\foreach\i in {1,...,12}  
  \draw[fill=white] (180-30*\i:\R) circle (\r) node {$\i$};
% Center (comment it or remove it if you don't want the center shown)
\fill (0,0) circle (0.5mm);
\end{tikzpicture}
\end{document}

I think that it's self-explanatory but just in case:

I made two variables \R and \r, for the radii. This way if you want to change them you don't need to look for then across all the code (not much in this case, but sometimes could be longer).
The \foreach statement repeats the next instruction as its name suggests, for each value of the variable \i in the range (1,...,12). So it draws 12 circles at the polar points which angle is function of \i: 180-30*\i (if you change the value 180 for another angle you can rotate the seats). As it is, the angles will be

180-30*1=150,  180-30*2=120,  ...  ,  180-30*12=-180

And finally this is the table:

Related Solutions

[Tex/LaTex] Best way to create this image, square and angle

Below is a solution using tkz-euclide (as Regis da Silva mentioned in a comment that I only now saw).

Edit: I've changed it slightly. Here you can change the size of the square simply by changing the position of point B. The reason that I didn't use tkzDrawPolygon to draw the triangle, is that the corners would extend a little outside the rectangle. Uncomment that line to see what I mean. Also, if the position of B is (1,0) the arc showing the angle is too large, and then you will want to uncomment the line size=0.4.

\documentclass{article} 
\usepackage{tkz-euclide}
\usetkzobj{all}
\begin{document}
\begin{tikzpicture}
    \tkzDefPoint(0,0){A}  \tkzLabelPoint[below left](A){A}
    \tkzDefPoint(3,0){B}  \tkzLabelPoint[below right](B){B}
    \tkzDefSquare(A,B)    \tkzGetPoints{C}{D}
    \tkzDrawSquare(A,B)
    \tkzLabelPoint[above right](C){C} \tkzLabelPoint[above left](D){D}
    \tkzDefMidPoint(C,D) \tkzGetPoint{E}  \tkzLabelPoint[above](E){E}
    \tkzDefMidPoint(B,C) \tkzGetPoint{F}  \tkzLabelPoint[right](F){F}
    \tkzDrawSegments(A,E E,F A,F)
    %\tkzDrawPolygon(A,E,F)
    \tkzDrawPoints[fill=black](E,F)
    \tkzMarkAngle[fill=red,%
                 %size=0.4,   % for small squares you may want to use this
                 opacity=0.4](F,A,E)
    \tkzLabelAngle[pos=1.2](E,A,F){$\alpha$}
\end{tikzpicture}
\end{document}

enter image description here

The problem with this package is that the manual is only in French, as far as I know.

You can mix this with normal TikZ, code, so wh1t3's code can be modified slightly, using tkz-euclide to draw the arc.

Note that instead of using \textcolor for all the labels, you can edit the every label style. The updated example shows this, as well as how to change the color of a single label (note the extra set of braces).

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{calc}
\usepackage{tkz-euclide}
\usetkzobj{all}
\begin{document}
    \noindent
    \begin{tikzpicture}[scale=3,every label/.style={color=blue}]
        \coordinate [label=left:$A$] (A) at (0,0);
        \coordinate [label=right:$B$] (B) at (1,0);
        \coordinate [label=right:$C$] (C) at (1,1);
        \coordinate [label=left:$D$] (D) at (0,1);
        \coordinate [label=above:$E$] (E) at ($(D)!.5!(C)$);
        \coordinate [label={[black]right:$F$}] (F) at ($(B)!.5!(C)$);
        \draw (A) rectangle (C);
        \draw [fill] (A) -- (E) circle[radius=.5pt] 
                         -- (F) circle[radius=.5pt] -- (A);
        \tkzMarkAngle[fill=red,opacity=.5,size=.3](F,A,E)
        \tkzLabelAngle[pos=.4](E,A,F){$\alpha$}
    \end{tikzpicture}
\end{document}

enter image description here

[Tex/LaTex] How to graph a function using TikZ

While tikz can do basic graphs, you should use pgfplots for graphing:

enter image description here

As hpesoj626 commented, sometimes it is better to have the axis lines in the middle. This also shows some of the other options that pgfplots provides:

enter image description here

Code:

\documentclass[border=2pt]{standalone}
\usepackage{pgfplots}

\begin{document}
\begin{tikzpicture}[scale=1.0]
\begin{axis}
    \addplot[domain=-10000:10000, blue, ultra thick] {14*x - x^2};
\end{axis}
\end{tikzpicture}
\end{document}

Code:

\documentclass[border=2pt]{standalone}
\usepackage{pgfplots}

\begin{document}
\begin{tikzpicture}
\begin{axis}[
        axis x line=middle, 
        axis y line=middle, 
        ymax=0.1E8, ylabel=$y$, 
        xlabel=$x$
        ]
    \addplot[domain=-10000:10000, blue, ultra thick] {14*x - x^2};
\end{axis}
\end{tikzpicture}
\end{document}

Best Answer

Related Solutions

[Tex/LaTex] Best way to create this image, square and angle

[Tex/LaTex] How to graph a function using TikZ

Code:

Code:

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