Linea ondulata con Tikz

drjhons” post=83428Buongiorno,
implementando questo codice:
`
\documentclass{beamer}
\usepackage[italian]{babel}
\usepackage[latin1]{inputenc}
\usepackage{tikz}
\usetikzlibrary{patterns}
\usetikzlibrary{decorations}
\begin{document}
\begin{frame}
\begin{tikzpicture}
\draw [decorate,decoration={snake,amplitude=2mm}](1,0) — (0.1,0);
\end{tikzpicture}
\end{frame}
\end{document}
`
il compilatore restituisce il seguente messaggio d’errore:
`
! Package pgfkeys Error: I do not know the key '/pgf/decoration/snake' and I am going to ignore it. Perhaps you misspelled it. See the pgfkeys package documentation for explanation. Type H for immediate help…. \end{frame}
`
Come posso risolvere il problema?

Credo che la libreria da caricare sia [tt]decorations.pathmorphing[/tt].

Ciao
Claudio

devi specificare pthmorphing nella chiamata della libreria, così:
`\documentclass{beamer}
\usepackage[italian]{babel}
\usepackage[latin1]{inputenc}
\usepackage{tikz}
\usetikzlibrary{patterns}
\usetikzlibrary{decorations.pathmorphing}
\begin{document}
\begin{frame}
\begin{tikzpicture}
\draw [decorate,decoration={snake,amplitude=2mm}](1,0) — (0.1,0);
\end{tikzpicture}
\end{frame}
\end{document}`

texdoc tikz da terminale, §3.2, in particolare §3.2.2 da pag. 322 a pag.324.