Description
The code is a LaTeX document that includes a tikzpicture environment to create a plot of a discrete-time signal. The signal values are defined in the file data.dat using two columns: one for the index n and another for the signal value hn. The tikzpicture environment includes an axis environment that defines the x and y axes, their labels, and some other properties such as the tick marks and the y-axis limits. Finally, the signal is plotted using the addplot command with the ycomb option to create a stem plot, and the data is loaded from the file data.dat using the table command with the x and y columns specified.
Keywords
tikz, pgfplots, filecontents, amsmath, axis, ycomb, table, xtick, xlabel, ylabel, ymin, ymax, n, hn.
Source Code
\documentclass[border={10pt}]{standalone}
\usepackage{tikz,pgfplots,filecontents,amsmath}
\pgfplotsset{compat=1.5}
\begin{filecontents}{data.dat}
n hn
0 2
1 -3
2 2.0
% 3 0.0
%4 0.0
% 5 0.0
\end{filecontents}
\begin{document}
\begin{tikzpicture}
\begin{axis}
[%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
axis x line=middle,
axis y line=middle,
every axis x label={at={(current axis.right of origin)},anchor=north west},
every axis y label={at={(current axis.above origin)},anchor= north west},
every axis plot post/.style={mark options={fill=black}},
xlabel={$n$},
ylabel={$\boldsymbol{h[n]}$},
xtick={-1,0,2,4},
ymin=-3,
ymax=3,
]%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\addplot+[ycomb,black,thick] table [x={n}, y={hn}] {data.dat};
\end{axis}
\end{tikzpicture}
\end{document}