Funktionen in Tikz

Ich möchte gerne verschiedene Funktionen zeichnen, latex zickt aber schon bei den einfachsten Sachen, wie zum Beispiel einer Power-Funktion.

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Code, hier editierbar zum Übersetzen:

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\documentclass[a4paper, 12pt]{article}
\usepackage[ngerman]{babel}\usepackage[utf8]{inputenc}
\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsmath}\usepackage{mathtools\usepackage{eurosym}\usepackage{wasysym}\usepackage{graphicx}\usepackage{tikz}\usepackage{adjustbox}\usetikzlibrary{shapes.misc} \usepackage{pgfplots}
\begin{document}
\begin{tikzpicture}[cross/.style={draw, cross out,
  minimum size=2*(#1-1pt), inner sep=0pt, outer sep=0pt}]
   %Raster zeichnen
   \draw [color=gray!50]  [step=5mm] (-5.5,-5.5) grid (5.5,5.5);
   % Achsen zeichnen
   \draw[->,thick] (-5,0) -- (5,0) node[right] {$x$};
   \draw[->,thick] (0,-5) -- (0,5) node[above] {$y$};
   % Achsen beschriften
   \foreach \x in {-1,0,1,2,5}
   \draw (\x,-.1) -- (\x,.1) node[below=4pt] {$\scriptstyle\x$};
   \foreach \y in {0,1,2,5}
   \draw (-.1,\y) -- (.1,\y) node[left=4pt] {$\scriptstyle\y$};
    %Funktionen zeichnen:
    \clip(-5,-5) rectangle (5,5);
    \draw[smooth, color=blue] plot (\x, pow(\x,2)) node[right] {$p_1$};           
\end{tikzpicture} 
\end{document}
 
 
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tikz

gefragt 14 Apr '14, 13:16

Astrina
371●11●19●25
Akzeptiert-Rate: 50%

bearbeitet 14 Apr '14, 13:18

Es fehlt auch noch eine Klammer hinter Paket mathtools

(14 Apr '14, 13:32) Johannes

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Herzlich willkommen auf der TeXwelt!

Das ist ein sehr gutes Minimalbeispiel, denn damit kann man den Fehler reproduzieren, es kommt:

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! Missing number, treated as zero.
<to be read again> 
                   p
l.29 ...aw[smooth, color=blue] plot (\x, pow(\x,2)
                                                  ) node[right] {$p_1$};
 
 
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Die Syntax ist völlig korrekt. In solchen Fällen, wo evtl. etwas internes in einer Funktion bzw. einem Makro falsch interpretiert wird, "schütze" ich die Stelle, indem ich sie in geschweifte Klammern einfasse. Das klappt hier mit {pow(\x,2)} und löst das Problem, die Zeile so geändert funktioniert es:

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\draw[smooth, color=blue] plot (\x, {pow(\x,2)}) node[right] {$p_1$};
 
 
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Parabel Plot

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beantwortet 14 Apr '14, 13:29

Felix
1.3k●52●56●67
Akzeptiert-Rate: 47%

Yay, funktioniert! Vielen Dank!

(14 Apr '14, 13:44) Astrina

Hier ist eine Alternative mit pgfplots. Für mich sieht es übersichtlicher aus und bedarf nicht so viel Handarbeit für Diagrammelemente. Ich habe relativ viele Optionen (ticks u.a.) angegeben, damit es Deiner Zeichnung mehr ähnelt.

Open in writeLaTeX

Code, hier editierbar zum Übersetzen:

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\documentclass[a4paper, 12pt]{article}
\usepackage{pgfplots}
\pgfplotsset{every minor tick/.style = {draw = none}}
\begin{document}
\begin{tikzpicture}
  \begin{axis}[
      axis x line = middle,
      axis y line = middle,
      xlabel = {$x$},
      ylabel = {$y$},
      xmin = -5, xmax = 5,
      ymin = -5, ymax = 5,
      restrict y to domain = -5:5,
      font=\tiny,
      xtick={-5,-4,-3,-2,-1,0,1,2,3,4,5},
      xticklabels={,,,-2,-1,0,1,2,,,5},
      ytick={-5,-4,-3,-2,-1,0,1,2,3,4,5},
      yticklabels={,,,,,0,1,2,,,5},
      minor tick num = 1,
      grid = both,
    ]
    \addplot[domain=-3:3, samples = 100, color = blue] {x^2};
  \end{axis}          
\end{tikzpicture} 
\end{document}
 
 
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Parabel mit pgfplots

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beantwortet 14 Apr '14, 14:00

stefan ♦♦
18.4k●16●31●48
Akzeptiert-Rate: 50%

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gestellte Frage: 14 Apr '14, 13:16

Frage wurde gesehen: 10,339 Mal

zuletzt geändert: 16 Apr '14, 20:45

Funktionen in Tikz

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