Re: Illegal character in array arg. – Gruppo Utilizzatori Italiani di TeX

3 Settembre 2012 alle 7:59 #77927

giuliofis” post=77112Ho provato a compilare questo
`\documentclass[a4paper,11pt]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage[italian]{babel}
\usepackage{fullpage}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{pgfplots}
\usepackage{graphicx}
\pgfplotsset{compat=newest}

\title{}
\author{}

\begin{document}

\maketitle
\tableofcontents

\section{Prova 1}

Prova tabella
\begin{center}
\begin{tabular}{cccccc} {\em valore\ } & 4 & 5 & 6 & 7 & 8 \\
{\em frequenza\ } & 1 & 3 & 2 & 4 & 2

\end{tabular}
\end{center}

\section{Prova 2}
Prova istogramma

\begin{center}
\begin{tikzpicture}
\begin{axis} [ylabel={Frequenza},
ybar,ymin=0,ymax=5,
ymajorgrids=true,
x tick label style={anchor=north},
xticklabel boundaries,
title style={align=center},
title={Istogramma a barre},
xlabel={Valore}]
\addplot
[fill=white,
draw=black] coordinates
{(4, 1) (5, 3)
(6, 2) (7, 4)
(8,2)};
\end{axis}
\end{tikzpicture}
\end{center}

Prova gaussiana

\newcommand\gauss[2]{1/(#2*sqrt(2*pi))*exp(-((x-#1)^2)/(2*#2^2))}

\begin{center}
\begin{tikzpicture}
\begin{axis}[every axis plot post/.append style={
mark=none,domain=0:9,samples=50,smooth},
axis x line*=bottom,
axis y line*=left,
enlargelimits=upper]
\addplot [black] {gauss(2,0.5)};
\addplot [black] {gauss(4,1)};
\end{axis}
\end{tikzpicture}
\end{center}

\end{document}`

E il risultato di pdflatex è quello sopra riportato, cioè
`giulio@desktop:~$ pdflatex '/home/giulio/Scrivania/Nuova cartella/prova.tex'
This is pdfTeX, Version 3.1415926-2.4-1.40.13 (TeX Live 2012)
restricted \write18 enabled.
entering extended mode
(/home/giulio/Scrivania/Nuova cartella/prova.tex
LaTeX2e <2011/06/27>
Babel and hyphenation patterns for english, dumylang, nohyphenation, ge
rman-x-2012-05-30, ngerman-x-2012-05-30, afrikaans, ancientgreek, ibycus, arabi
c, armenian, basque, bulgarian, catalan, pinyin, coptic, croatian, czech, danis
h, dutch, ukenglish, usenglishmax, esperanto, estonian, ethiopic, farsi, finnis
h, french, friulan, galician, german, ngerman, swissgerman, monogreek, greek, h
ungarian, icelandic, assamese, bengali, gujarati, hindi, kannada, malayalam, ma
rathi, oriya, panjabi, tamil, telugu, indonesian, interlingua, irish, italian,
kurmanji, latin, latvian, lithuanian, mongolian, mongolianlmc, bokmal, nynorsk,
polish, portuguese, romanian, romansh, russian, sanskrit, serbian, serbianc, s
lovak, slovenian, spanish, swedish, turkish, turkmen, ukrainian, uppersorbian,
welsh, loaded.
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Document Class: article 2007/10/19 v1.4h Standard LaTeX document class
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Package pgfplots notification 'compat/show suggested version=true': document ha
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(/usr/local/texlive/2012/texmf-dist/tex/latex/amsfonts/umsb.fd) (./prova.toc)

! Package pgfkeys Error: I do not know the key '/tikz/xticklabel boundaries' an
d I am going to ignore it. Perhaps you misspelled it.

See the pgfkeys package documentation for explanation.
Type H for immediate help.
…

l.52 \end{axis}

?

! Package PGF Math Error: Unknown function `gauss' (in 'gauss(2,0.5)').

See the PGF Math package documentation for explanation.
Type H for immediate help.
…

l.67 \addplot [black] {gauss(2,0.5)};

?

! Package PGF Math Error: Unknown function `gauss' (in 'gauss(2,0.5)').

See the PGF Math package documentation for explanation.
Type H for immediate help.
…

l.67 \addplot [black] {gauss(2,0.5)};

? h
This error message was generated by an \errmessage
command, so I can't give any explicit help.
Pretend that you're Hercule Poirot: Examine all clues,
and deduce the truth by order and method.`

Mentre questo è il contenuto di .log
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Questo quello di .fdb_latexmk (non so se serva…)
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(generated)
“prova.pdf”
“prova.aux”
“prova.log”
“prova.toc”`

Di quali altri comandi vi può essere utile il risultato per aiutarmi?
Grazie a tutti.

Il codice era sufficiente. 🙂

I problemi sono parecchi: per prima cosa non esiste [tt]xticklabel boundaries[/tt], ma [tt]xticklabel interval boundaries[/tt]. Da qui uno degli errori che lamentavi. Attenzione perché inserendo comunque la chiave corretta il risultato non è particolarmente carino: consiglio di leggere la documentazione di pgfplots (con texdoc pgfplots da terminale) oltre alle guide introduttive http://www.lorenzopantieri.net/LaTeX_files/Grafici.pdf e l’articolo per ArsTeXnica http://www.guitex.org/home/it/numero-12 Creare grafici con pgfplots.

Veniamo al problema della gaussiana. Qui c’è una serie di errori.. mi spiego meglio. Se definisci un nuovo comando, sicuramente quando lo richiami non puoi omettere il [tt]\[/tt]. Se definisci un comando con newcommand poi non puoi richiamarlo come stai facendo: [tt]\gauss(primo argomento, secondo argomento)[/tt].Per richiamarlo in quel modo serve usare [tt]\def[/tt].

Ecco l’esempio funzionante:

`\documentclass[a4paper,11pt]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage[italian]{babel}
\usepackage{fullpage}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{pgfplots}
\usepackage{graphicx}
\pgfplotsset{compat=newest}

\title{}
\author{}

\begin{document}

\maketitle
\tableofcontents

\section{Prova 1}

Prova tabella
\begin{center}
\begin{tabular}{cccccc} {\em valore\ } & 4 & 5 & 6 & 7 & 8 \\
{\em frequenza\ } & 1 & 3 & 2 & 4 & 2

\end{tabular}
\end{center}

\section{Prova 2}
Prova istogramma

\begin{center}
\begin{tikzpicture}
\begin{axis} [ylabel={Frequenza},
ybar,ymin=0,ymax=5,
ymajorgrids=true,
x tick label style={anchor=north},
xticklabel interval boundaries,
title style={align=center},
title={Istogramma a barre},
xlabel={Valore}]
\addplot
[fill=white,
draw=black] coordinates
{(4, 1) (5, 3)
(6, 2) (7, 4)
(8,2)};
\end{axis}
\end{tikzpicture}
\end{center}

\newpage

Prova gaussiana

\def\gauss(#1,#2){1/(#2*sqrt(2*pi))*exp(-((x-#1)^2)/(2*#2^2))}

\begin{center}
\begin{tikzpicture}
\begin{axis}[every axis plot post/.append style={
mark=none,domain=0:9,samples=50,smooth},
axis x line*=bottom,
axis y line*=left,
enlargelimits=upper]
\addplot [black] {\gauss(2,0.5)};
\addplot [black] {\gauss(4,1)};
\end{axis}
\end{tikzpicture}
\end{center}

\end{document}`

In alternativa, il grafico della gaussiana può anche essere fatto calcolare da gnuplot; in quel caso:

`Prova gaussiana

\def\gauss(#1,#2){1/(#2*sqrt(2*pi))*exp(-((x-#1)^2)/(2*#2^2))}

\begin{center}
\begin{tikzpicture}
\begin{axis}[every axis plot post/.append style={
mark=none,domain=0:9,samples=50,smooth},
axis x line*=bottom,
axis y line*=left,
enlargelimits=upper]
\addplot [black] gnuplot{\gauss(2,0.5)};
\addplot [black] gnuplot{\gauss(4,1)};
\end{axis}
\end{tikzpicture}
\end{center}`

Si compili con [tt]pdflatex -shell-escape[/tt].

Ciao
Claudio