[Tex/LaTex] How to draw images in Latex

draw

I'm trying to draw the following picture in LaTeX but I'm having trouble understanding what I should use. I've seen a few examples, but it's hard to adapt them into what I'm looking for.

If you could help, I'd be truly grateful.

Best Answer

Welcome to TeX.SE!

Here is a simple prototype of what you need. Hopefully, you may apply your desired customizations to it.

\documentclass[border=1pt]{standalone}
\usepackage{tikz}  %TikZ central library is called.
\usetikzlibrary{automata,positioning} % automata and positioning libraries are required to use nodes and coordinates in addition to placement propetries.
\begin{document}
    \begin{tikzpicture}[shorten >=1pt,node distance=1.0cm,on grid,auto] % Some customizations related to the size and the discatnce between nodes and arrow heads
    \node[state,rectangle, align=center] (q_r) [] {This is a \\ square}; % Here the nodes and coordinates are defined
    \node[coordinate] (q_0) [right=of q_r, xshift=3cm]   {};
    \node[coordinate] (q_1) [left=of q_r, xshift=-3cm, yshift=1mm]   {};
    \node[coordinate] (q_2) [left=of q_r, xshift=-3cm, yshift=-1mm]   {};
    \path[->] % path and draw commands connect the nodes and coordinates to each other.
    (q_r) edge [] node  {This is an arrow} (q_0);   
    \draw[->] ([yshift=-3mm]q_1) -- ([yshift=-2mm]q_r.west) node[midway,swap] {This is an arrow};
    \draw[->] ([yshift=3mm]q_2) -- ([yshift=2mm]q_r.west) node[midway] {This is an arrow};
    \end{tikzpicture}
\end{document}

Related Solutions

[Tex/LaTex] Tikz, how to draw concentric circles with radii and something more

There are various ways you could do this, but building on what you have.

To place a node halfway along a path, use \draw (a) -- node{..} (b);. Note the placement of the node, just after the --. You can also specify any position along the path, by saying e.g. \draw (a) -- (b) node[pos=<fraction>] {..};, where <fraction> is a number between 0 (start of path) and 1 (end of path).

To change the colour of the node, just add a color in the node options.

I used an arrow tip from the arrows.meta library to draw the black dot in the origin. Saying \draw [<arrow tip>-<arrow tip>] (a) -- (b); will draw a line from a to b with the arrow tip specified by <arrow tip> at each end of the line. Here I used just Circle-, which adds the Circle arrow tip at the beginning of the line, and no arrow tip at the end.

\documentclass[border=5mm]{standalone}
\usepackage{tikz}
\usetikzlibrary{arrows.meta}
\begin{document}
\begin{tikzpicture}
\draw [magenta, thick] circle [radius=3];
\draw [blue] circle [radius=4.3];

\draw [Circle-] (0,0) -- node[left,red] {$R$} (60:3);

\draw (0:3) -- node[above,cyan] {$a$} (0:4.3);
\end{tikzpicture}
\end{document}

[Tex/LaTex] draw simple vectors with latex

as starting point (not reproduce your sketch, but on this basis you can see how to draw yours):

\documentclass[tikz,border=3mm]{standalone}
\usetikzlibrary{angles, arrows.meta, quotes}
\usepackage{siunitx}

    \begin{document}
 \begin{tikzpicture}[
            > = Straight Barb,
phasor/.style = {very thick,-{Stealth}},
angles/.style = {draw, <->, angle eccentricity=1,
                 right, angle radius=7mm}
                        ]
% coordinates
    \draw[->] (-0.5,0) -- (4,0) coordinate (x) node[below left] {$\mathit{Re}$};
    \draw[->] (0,-1.5) -- (0,2) node[below left] (y) {$\mathit{Im}$};
% phasors
    \draw[phasor] (0,0) -- (300:1.5) coordinate (i)  node[right] {I};% used polar coordinates
    \draw[phasor] (0,0) -- ( 30:2.5) coordinate (v)  node[right] {V};% used polar coordinates
% angles drawn by pic
\coordinate (X)   at (0,0);
\draw
    pic["$\theta=\phi-\SI{90}{\degree}$",angles] {angle=i--X--x}
    pic["$\phi$",angles] {angle=x--X--v}
    ;
\end{tikzpicture}
    \end{document}

Best Answer

Related Solutions

[Tex/LaTex] Tikz, how to draw concentric circles with radii and something more

[Tex/LaTex] draw simple vectors with latex

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