I want to put a legend in this two plot:
i have this code:
\begin{figure}[!ht]
\resizebox{\textwidth}{!}{
\begin{tikzpicture}
\begin{axis}[xmin=0, xmax=90,axis y line*=left,ymin=8.62,ymax=8.69, xlabel=
{Tempo [ore]}, ylabel={Pressione [bar]},title={$P_{media}$ VS
$T_{media}$},legend style={at={(1,1)},anchor=south east}]
\addplot[thick,black] table[x=tempo,y=P_mean]
{capitolo4/grafici/t_meanVSp_mean2.txt};
\addlegendentry={Pressione}
\end{axis}
\begin{axis}[xmin=0, xmax=90,axis y line*=right,ymin=20.5,ymax=23.0, ylabel=
{Temperatura [°C]}]
\addplot[dashed,black] table[x=tempo,y=T_mean]
{capitolo4/grafici/t_meanVSp_mean2.txt};
\addlegendentry={Temperatura}
\end{axis}
\end{tikzpicture}
\begin{tikzpicture}
\begin{axis}[xmin=0, xmax=90,ymin=8.55,ymax=8.75,xlabel={Tempo [ore]},
ylabel={Pressione [bar]},title={$P_{sperimentale}$ VS $P_{ideale}$ },legend
style={at={(1,1)},anchor=north east}]
\addplot[only marks,mark=o] table[x=tempo,y=p_sp]
{capitolo4/grafici/t_meanVSp_mean3.txt};
\addplot[thick,black] table[x=tempo,y=p_id]
{capitolo4/grafici/t_meanVSp_mean3.txt};
\legend={Psperimentale,Pideale}
\end{axis}
\end{tikzpicture}
}
but when i compile the pdf it returns this:
so it doesn't write the name of the mark in the plot and the position of the legend is not where it should be (i set south east and it prints in the north east of the plot).