2

I would like to change the discretization tikz uses in order to get a smoother graph.

 \documentclass[article]{standalone}

 \usepackage{tikz}
 \usepackage{pgfplots}
 \pgfplotsset{compat = newest}  % loads newest improved settings

\begin{document}

\begin{tikzpicture}

\begin{axis}[scale only axis, xlabel = x, xmin = 0, xmax = 4, ylabel = y,  ymax = 40, ymin = 0, ytick pos=left]



\addplot [black, domain=0:3.5] {25*x^0.2};

 \end{axis}
 \end{tikzpicture}
 \end{document}

enter image description here

  • 2
    \addplot [black, domain=0:3.5, samples=100] {25*x^0.2}; – Dr. Manuel Kuehner Nov 6 '17 at 11:27
  • Problem solved? – Dr. Manuel Kuehner Nov 6 '17 at 14:13
  • or \addplot [black, domain=0:3.5, smooth] {25*x^0.2}; :-) – Zarko Nov 6 '17 at 14:35
  • @Dr.ManuelKuehner, thank you, works perfectly! I use samples=1000, with samples=100 I still get a little kink. @zarko, thank you! smooth doesn`t work for me, still a kink. – Sophie Nov 6 '17 at 14:53
4

Comment2Answer :)

\addplot [black, domain=0:3.5, samples=100] {25*x^0.2};

The samples option of the \addplot command defines the number of supporting points (German Stützstellen).

enter image description here

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