\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
\usepackage{pgfplots}
%\usepackage{pgf-pie}  
\pgfplotsset{colormap/jet,width=3.5in,compat=1.16}
\title{pgfplots}
\author{Gerardo Marx Chávez-Campos}
\date{February 2021}

\begin{document}

\maketitle

\section{\LaTeX{} as calculator}
This is an example to insert plots computed by \LaTeX{}:

\begin{figure}[!htb]
    \centering
    \begin{tikzpicture}
    \begin{axis}
    \addplot{3*x+5};
    \addlegendentry{$f(x)$}
    \addplot{x^2+5};
    \addlegendentry{$g(x)$}
    \end{axis}
    \end{tikzpicture}
    \caption{Caption}
    \label{fig:my_label}
\end{figure}

\newpage
\section{Bar plots}
\begin{figure}[!htb]
    \centering
    \begin{tikzpicture}
 \begin{axis}[
 	xlabel=Groups,
 	ylabel= Counts,
 	symbolic x coords={Group1, Group2, Group3},
 	ybar,nodes near coords,
 	enlarge x limits  = 0.15,
 	xtick=data
 	]
 	\addplot coordinates{
 	(Group1,3)
 	(Group2,4)
 	(Group3,2)
 	};
 	\addplot coordinates{
 	(Group1,2)
 	(Group2,4)
 	(Group3,1)
 	};
 	\legend{MacOs, Windows}
    \end{axis}
    \end{tikzpicture}
    \caption{Caption}
    \label{fig:my_label}
\end{figure}


%\section{Pie charts}
%\begin{figure}
%    \centering
%    \begin{tikzpicture}
%\pie{22.97/Los Angeles Lakers,
%    22.97/Boston Celtics,
%    8.11/Golden State Warriors,
%    8.11/Chicago Bulls,
%    6.76/San Antonio Spurs,
%    31.07/Other Teams}
%\end{tikzpicture}
%    \caption{Caption}
%    \label{fig:my_label}
%\end{figure}


\section{Reading data from CSV files}
\begin{tikzpicture}
 \begin{semilogyaxis}[
 	legend pos=north west,
 	%ylabel style={rotate =-90},
 	xlabel=x,
 	ylabel=y]
 	\addplot[color=black, mark=*, line width=1pt] table[x=time, y=voltage, col sep=comma]{data.csv};
 	\addlegendentry{voltage}
 	\addplot table[x=time, y=current, col sep=comma]{data.csv};
 		\addlegendentry{current}
 \end{semilogyaxis}
 \end{tikzpicture}

\section{3D Plots}
\begin{figure}[!htb]
    \centering
    \begin{tikzpicture}
    \begin{axis}
    \addplot3[
    mesh,
    samples=50,
    domain=-10:9
    ]
    {sin(deg(sqrt(x^2+y^2)))/sqrt(x^2+y^2)};
    \addlegendentry{$f(x)$}
    \end{axis}
    \end{tikzpicture}
    \caption{The Mexican hat}
    \label{fig:my_label}
\end{figure}





\section{How to configure PGFPlots}
\begin{figure}[!h]
    \centering
%    \includegraphics{}
    \begin{tikzpicture}
    \begin{axis}[
    xlabel=time $t$,
    mark size =2.5pt,
    ylabel= $f(t)$
    legend pos=north west,
    ymajorgrids=true,
    grid style=dashed,
    ]
    \addplot[
    dashed,
    domain=-3:3,
    samples=20,
    mark=*,
    color=black,
    line width=1pt,
    ]
    {x^2+9};
    \addlegendentry{Eq1}
    \addplot[
    dotted,
    mark options={solid},
    domain=-3:3,
    samples=20,
    mark=o,
    line width=1pt,
    color=black!40!white]
    {20*sin(2*x*20)};
    \addlegendentry{$\sin(40x)$}
    \end{axis}
    \end{tikzpicture}
    \caption{Caption}
    \label{fig:my_label}
\end{figure}
\end{document}