I have the following code:
\begin{center}
\begin{figure}[H]
\begin{tabular}{lll}\vspace*{0.2 cm}
%1
\begin{tikzpicture}
\draw[->] (-0.5,0) -- (2,0) node[right] {$x_1$};
\draw[->] (0,-0.5) -- (0,2) node[above] {$x_2$};
\draw[dashed, -, red] (-0.3,-0.8) -- (1.8, 1.3);
% Circles and crosses
\draw[blue] (0,0) circle (0.175cm);
\draw[blue] (1,1) circle (0.175cm);
\draw (0,1) node[cross=4pt, red] {};
\draw (1,0) node[cross=4pt, red] {};
\end{tikzpicture}
&
%2
\begin{tikzpicture}
\draw[->] (-0.5,0) -- (2,0) node[right] {$x_1$};
\draw[->] (0,-0.5) -- (0,2) node[above] {$x_2$};
\draw[dashed, -, red] (-0.6,-.1) -- (1.5, 1.8);
% Circles and crosses
\draw[blue] (0,0) circle (0.175cm);
\draw[blue] (1,1) circle (0.175cm);
\draw (0,1) node[cross=4pt, red] {};
\draw (1,0) node[cross=4pt, red] {};
\end{tikzpicture}
&
%3
\begin{tikzpicture}
\draw[->] (-0.5,0) -- (2,0) node[right] {$x_1$};
\draw[->] (0,-0.5) -- (0,2) node[above] {$x_2$};
\draw[dashed, -, red] (0.5, -0.6) -- (0.5, 1.6);
% Circles and crosses
\draw[blue] (0,0) circle (0.175cm);
\draw[blue] (1,1) circle (0.175cm);
\draw (0,1) node[cross=4pt, red] {};
\draw (1,0) node[cross=4pt, red] {};
\end{tikzpicture}
\\
%
\begin{tikzpicture}
\draw[->] (-0.5,0) -- (2,0) node[right] {$x_1$};
\draw[->] (0,-0.5) -- (0,2) node[above] {$x_2$};
\draw[dashed, -, red] (-0.2, 1.5) -- (1.5, -0.3);
% Circles and crosses
\draw[blue] (0,0) circle (0.175cm);
\draw[blue] (1,1) circle (0.175cm);
\draw (0,1) node[cross=4pt, red] {};
\draw (1,0) node[cross=4pt, red] {};
\end{tikzpicture}%
&
\begin{tikzpicture}
\draw[->] (-0.5,0) -- (2,0) node[right] {$x_1$};
\draw[->] (0,-0.5) -- (0,2) node[above] {$x_2$};
\draw[dashed, -, red] (-0.3, 1.1) -- (1.2, -0.4);
% Circles and crosses
\draw[blue] (0,0) circle (0.175cm);
\draw[blue] (1,1) circle (0.175cm);
\draw (0,1) node[cross=4pt, red] {};
\draw (1,0) node[cross=4pt, red] {};
\end{tikzpicture}%
&
\begin{tikzpicture}
\draw[->] (-0.5,0) -- (2,0) node[right] {$x_1$};
\draw[->] (0,-0.5) -- (0,2) node[above] {$x_2$};
\draw[dashed, -, red] (-0.6, 0.5) -- (1.6, 0.5);
% Circles and crosses
\draw[blue] (0,0) circle (0.175cm);
\draw[blue] (1,1) circle (0.175cm);
\draw (0,1) node[cross=4pt, red] {};
\draw (1,0) node[cross=4pt, red] {};
\end{tikzpicture}
\end{tabular}%
\caption{Casos de clasificadores}
\label{fig: xor_cases}
\end{figure}
\end{center}
Which produces the following figure:
The upper left (first) subplot is misaligned with the rest of the row height-wise and I have no clue why. How can I fix this?
Also, I want to have a curly bracket that encompasses the first two columns. I tried using tikzmarkz
but couldn't manage to get it working.
Any ideas on how to do this?