all of my favorite tex things

latex-plot.tex

% required package for plotting
\usepackage{pgfplots}

% required package for plotting
\begin{center}
\begin{tikzpicture}
\begin{axis}[
    title={Question 2},
    xlabel={Nodes},
    ylabel={Voltage (V)},
    xmin=0, xmax=16,
    ymin=0, ymax=2,
    xtick={0,2,4,6,8,10,12,14,16},
    ytick={0,0.5,1,1.5,2},
    legend pos=south west,
    ymajorgrids=true,
    xmajorgrids=true,
    grid style=dashed,
]
 
\addplot[
    color=blue,
    mark=square,
    ]
    coordinates {
    (2,1.548)(10,1.382)(16,1.301)
    };
    
\addplot[
    color=red,
    mark=o,
    ]
    coordinates {
    (2,1.531)(10,1.351)(16,1.238)
    };

\addplot[
    color=black,
    mark=triangle,
    ]
    coordinates {
    (2,1.618)(10,1.224)(16,1.145)
    };
    \legend{2.1,2.2,2.3}
 
\end{axis}
\end{tikzpicture}
\end{center}

reference.tex

% extra special mystery commands
     %comment-out to make sure there are no more todos
     \newcommand{\todo}[1]{\textcolor{red}{\textbf{[#1]}}}
     %Consistent cross referencing
     \def\fig#1{Figure~\ref{#1}}
     \def\tab#1{Table~\ref{#1}}
     \def\eqn#1{Equation~\ref{#1}}

% EXAMPLE LIST
    \begin{itemize}
    \item LF411 op amp
    \item $14.777nF$ Capacitor
    \end{itemize}

% EXAMPLE FIGURE (AND REFERENCE)
    \begin{figure}[ht]
    \centering
    \graphicspath{ {eqns/}{figs/}{scope/} }
    \includegraphics{pins.jpg}
    \label{Pin_OPAMP}
    \caption{Pin Diagram for LF411 OP AMP}
    \end{figure}

% EXAMPLE CODE INSERTION
    \begin{framed}
    \lstinputlisting[language=MATLAB]{Lab2.m}
    \end{framed}

% EXAMPLE MATLAB OUTPUT
    \begin{verbatim}
    j =
        0.2239   -0.2601   -0.3971   -0.1776
        0.5767    0.3391   -0.0660   -0.3276
        0.3528    0.4861    0.3641    0.0466
    end{verbatim}

% EXAMPLE MULTILINE EQUATION
    \begin{gather*}
    yay multiline equations \\
        more equations = fun
    \end{gather*}

% EXAMPLE TABLE FOR BEAUTY
    \begin{table}[h!]
    \centering
        \begin{tabular}{||c c c c||}
            \hline
            Input (V) & Difference (mV) & Theoretical (mV) & Error (\%) \\ [0.5ex]
            \hline\hline
                1 & 0.5 & 0.05 & -90 \\
                    3 & 0.4 & 0.08 & -80 \\
                    8 & 0.3 & 0.15 & -50 \\[1ex]
                \hline
            \end{tabular}
    \end{table}

subfigure.tex

\begin{figure}[ht]
\centering
    \begin{subfigure}{.5\textwidth}
        \centering
        \graphicspath{ {scope/} }
        \includegraphics[scale=0.45]{"222gain (1)".PNG}
        \label{gain1}
        \captionof{figure}{Output with $1kHz$ input, gain = $7.2 V/V$}
    \end{subfigure}%
    \begin{subfigure}{.5\textwidth}
        \centering
        \graphicspath{ {scope/} }
        \includegraphics[scale=0.45]{"222gain (4)".PNG}
        \label{gain2}
        \captionof{figure}{Output with $10kHz$ input, gain = $7.2 V/V$}
    \end{subfigure}
    \begin{subfigure}{.5\textwidth}
        \centering
        \graphicspath{ {scope/} }
        \includegraphics[scale=0.45]{"222gain (3)".PNG}
        \label{gain3}
        \captionof{figure}{Output with $20kHz$ input, gain = $2.8 V/V$}
    \end{subfigure}%
    \begin{subfigure}{.5\textwidth}
        \centering
        \graphicspath{ {scope/} }
        \includegraphics[scale=0.45]{"222gain (2)".PNG}
        \label{gain4}
        \captionof{figure}{Output with $100kHz$ input, gain = $1.3 V/V$}
    \end{subfigure}\\
\caption{from oscilloscope - amplifier frequency vs gain  }
\end{figure}