Fig_TEST.tex

\begin{figure}
    \begin{tikzpicture}
        \pgfplotsset{table/search path={fig/ex05}}
        \begin{groupplot}[group style={group size=1 by 3, xticklabels at = edge bottom, vertical sep=0.75cm}, height=0.375\textheight, width=0.875\textwidth, xmin=0, xmax=pi, grid,clip = false, ymin = -0.1, ymax =1.1, xtick = {0, pi/4, pi/2, 3*pi/4,pi}, xticklabels = {0,$\frac{1}{4}\pi$, $\frac{1}{2}\pi$,$\frac{3}{4}\pi$, $\pi$}, ytick = {-1, 0, 1}, yticklabels = {, 0, 1}]

            %  % Top plot: duty cycle and carrier signal
            \nextgroupplot[ylabel = {$d(t), c(t)$}, legend pos=south east, legend columns=2]
             \addplot[signalred, thick] table[x=wt, y=d, col sep=comma] {PWM_PFC_example.csv}; 
            \addplot[signalblue, thick] table[x=wt, y=c, col sep=comma] {PWM_PFC_example.csv}; 
            \legend{$d(t)$, $c(t)$}

            % middle plot: switching signal
            \nextgroupplot[ylabel = {$s(t)$}] 
            \addplot[signalblue, thick] table[x=wt, y=s, col sep=comma] {PWM_PFC_example.csv}; 

            % bottom plot: current response 
            \nextgroupplot[ylabel = {$i_1(t)$}, xlabel={$\omega t$}, ytick = {-1, 0, 0.5, 1}, yticklabels = {}, legend columns=2] 
            \addplot[signalred, thick] table[x=wt, y=i1, col sep=comma] {PWM_PFC_example.csv}; 
            \addplot[thick, dashed] table[x=wt, y=i1ref, col sep=comma] {PWM_PFC_example.csv};
            \legend{$i_1(t)$, $i_1^{(1)}(t)$} 
         \end{groupplot}
    \end{tikzpicture}
\end{figure}