There is a problem when I try to draw something over an already done graph, like a parabola:
\begin{tikzpicture}
\begin{axis}
\addplot[red, ultra thick] (x*x,x);
\end{axis}
\end{tikzpicture}
Let's assume there is another constant at x=-3
, so we would would expecte a vertical segment along the x value. Instead we get:
\begin{tikzpicture}
\begin{axis}
\addplot[red, ultra thick] (x*x,x);
\draw[dashed,color=blue] (-3,-10) -- (-3,10);
\end{axis}
\end{tikzpicture}
and all that is done is the thin blue segment. I was expecting something more notable. Aren't all elements of tikzpicture supposed to be done in the same scale or using the same coordinate system?