`\begin{figure}
\centering
\begin{tikzpicture}
\makeatletter \newcommand{\pgfplotsdrawaxis}{\pgfplots@draw@axis} \makeatother
\pgfplotsset{axis line on top/.style={
axis on top=false,
after end axis/.code={
\pgfplotsset{axis line style=opaque,
ticklabel style=opaque,
tick style=opaque,
grid=none}
\pgfplotsdrawaxis}
}
}
\pgfdeclarehorizontalshading{stefan}{50bp}{
color(0.00000000000000bp)=(violet);
color(8.33333333333333bp)=(blue);
color(16.66666666666670bp)=(cyan);
color(25.00000000000000bp)=(green);
color(33.33333333333330bp)=(yellow);
color(41.66666666666670bp)=(orange);
color(50.00000000000000bp)=(red)
}
\begin{axis}[
%height=9cm,
%width=9cm,
grid=major,
xmajorgrids,
xmin=-0.3,
xmax=0.3,
ymin=0,
ymax=6,
point meta min={-0.3},
point meta max={0.3},
axis line on top,
%xtick={-0.3,-0.29,…,0.3},
xticklabels={%
$-0.4$,
$-0.3$,
$-0.2$,
$-0.1$,
$\mu$,
$0.1$,
$0.2$,
$0.3$,
$0.4$},
% note: \frac can be done automatically:
% xticklabel style={/pgf/number format/frac},
minor tick num=4,
xlabel=\large$x$,
ylabel=\large$f_{\mu,\sigma^2}(x)$,
colorbar horizontal,colormap/new,no markers,
colormap={new}{color(0cm)=(violet);color(1cm)=(blue);color(2cm)=(cyan);color(3cm)=(green);color(4cm)=(yellow);color(5cm)=(orange);color(6cm)=(red)}]
\addplot gnuplot[shading=stefan,color=black,shader=interp,id=DoG,samples=1000,domain=-0.3:0.3,y domain=0:1]{((1/(sqrt(2*pi*0.00570275999999999)))*exp(-(x-0)**2/(2*0.00570275999999999)))}\closedcycle;
\addplot+ gnuplot[mesh,point meta=x,id=DoG,samples=1000,domain=-0.3:0.3,y domain=0:1]{((1/(sqrt(2*pi*0.00570275999999999)))*exp(-(x-0)**2/(2*0.00570275999999999)))}\closedcycle;
\addplot+ [black] coordinates {(0,0)(0,6)};
\pgfplotsset{tick style={thin,black},every mark/.append style={solid}}
\end{axis}
\begin{axis}[
%height=9cm,
%width=9cm,
xmin=-0.3,
xmax=0.3,
ymin=0,
ymax=6,
axis line on top,
axis y line*=right,
axis x line=none
]
\pgfplotsset{tick style={thin,black},every mark/.append style={solid}}
\end{axis}
\begin{axis}[
%height=9cm,
%width=9cm,
xmin=-0.3,
xmax=0.3,
ymin=0,
ymax=6,
axis line on top,
axis x line*=top,
axis y line=none,
xticklabels={%
$-0.4$,
$-0.3$,
$-0.2$,
$-0.1$,
$\mu$,
$0.1$,
$0.2$,
$0.3$,
$0.4$}
]
\pgfplotsset{tick style={thin,black},every mark/.append style={solid}}
\end{axis}
\end{tikzpicture}
\caption{Plot}
\end{figure}`
ecco ! haha ho capito, grazie mille, mi hai anticipato davvero quando ho messo axis on top e ho visto la griglia sopra me la sono un pò fatta piacere ! e invece tu mi avevi già dato la soluzione lol gli assi con i valori gli ho messi ma nn sono sicuro che mi piacciano… perchè l’ area del grafico quando compilo solo ogni tanto viene esportata in modo corretto nel pdf da pdflatex mentre la visualizzo sempre correttamente dal visualizzatore dell’ editor ? Con point meta min e max posso scegliere solo il minimo e il massimo giusto?