Il problema (se così si può chiamare) ora è veramente risolto. Allego un grafico fatto con pgfplots per mostrarne un tipico uso:`\documentclass{article}
\usepackage[centering]{geometry}
\usepackage{pgfplots}
\newcommand{\CL}{\leavevmode{\sffamily \raise.6ex\hbox{\footnotesize C}\kern -.41em L\@}}
\begin{document}
\begin{tikzpicture}
\pgfplotsset{compat=1.3,width=14cm, height=10cm}
\begin{axis}[xmin=0,%
xmax=180000,%
ymin=-100,%
ymax=100,%
xlabel=$N$ — (cicli),%
ylabel=$a$ — (mm),%
grid=major]
\addplot coordinates {
(0,7)
(30000,10)
(60000,15)
(70000,18)
(90000,21)
(100000,23)
(110000,27)
(120000,31)
(140000,40)
(150000,46)
(160000,52)
(175000,70)
(177000,97)
};
\addplot coordinates {
(0,-7)
(30000,-10)
(60000,-15)
(70000,-18)
(90000,-21)
(100000,-23)
(110000,-27)
(120000,-31)
(140000,-40)
(150000,-46)
(160000,-52)
(175000,-70)
(177000,-97)
};
\draw[draw=black, style=dashed] (axis cs:0,-70) — (axis cs:180000,-70);
\draw[draw=black, style=dashed] (axis cs:0,+70) — (axis cs:180000,+70);
\node[fill=white] at (axis cs:90000,-70) {\CL};
\node[fill=white] at (axis cs:90000,+70) {\CL};
\end{axis}
\end{tikzpicture}
\end{document}`
Grazie ancora 😉 ,
ansys.