Graphics, Figures & Tables ⇒ pgfplots | Proper Decoration Coils

[thinkpadT]

hi everyone,

for the plotted curve, there is the need of the sinusoidal grating profile on the plot. For this purpose decoration is used. But the result is not satisfactory because i could not manage to get rid of the tail and expand/change the distance between the crests and troughs d.

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Code, edit and compile here:

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\documentclass{standalone}
\usepackage[bitstream-charter]{mathdesign} %for a much better readable font
\usepackage{pgfplots}
\usepackage{tikz}
\pgfplotsset{compat=newest}
\usetikzlibrary{positioning} 
\usetikzlibrary{%
  decorations.pathreplacing,%
  decorations.pathmorphing%
}
\begin{document}
  \begin{tikzpicture}
    \begin{axis} [
      xlabel=$\lambda/h$, %$\lambda $ \lbrack $ nm $\rbrack 
      xtick={1,2,...,11},
      ylabel=Efficiency,
      ymax=1,
      ymin=0,
      mark=none,
      legend style={
        legend pos=north east,
        font=\tiny,
        draw=none
      } % place the legend box in the right place  at ={(0.85, 0.65)}
    ]
      \pgfplotstableread{uni-holographic-eff.txt} 
      \teff      %effs=efficiencies
      \addplot [color = blue, mark=none, smooth, very thick] table[y=one] from \teff;
      \addlegendentry{Universal Efficiency Curve of Holographic Grating};
      \draw[decorate,decoration={coil,aspect=0,amplitude=10}] (axis cs:2,0.7) -- (axis cs:3.5,0.7);
    \end{axis}
  \end{tikzpicture}
\end{document}
 
 
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Run LaTeX here

Till now i have only found "hacks" on how to manipulate coils; are there a direct method available too?


Thanks in advance
-Fawad

[localghost]

You could replace the drawn coil by a plot command like this.

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\addplot[domain=2:3.62,samples=50] {0.05*sin(10*deg(x)-80)+0.7};
 
 
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The parameters are the result of some fiddling.


Thorsten

[Jamesraw]

Wow, you guys are genius! Indeed, the result always depends on good handling.