Graphics, Figures & Tables ⇒ pgfplots | Smooth a Data Plot

[thinkpadT]

Hi everyone,

I wanted to smoothen the plotted line for the used data or even use an linear extrapolation with or without Gnuplot, has anyone experience there and point me to a direction or reference. Please find attached the used data file.

Code: Select all

\documentclass{standalone}
\usepackage[T1]{fontenc}
\usepackage{pgfplots,pgfplotstable}

\pgfplotsset{compat=newest}

\begin{document}
  \begin{tikzpicture}
    \begin{axis} [
      grid =major,
%      grid style={dashed},
%      thick,
      xlabel= $\lambda/h$,  %$\lambda $ \lbrack $ nm $\rbrack 
%      xtick = {3,5,...,31},
%      xmax=210,
%      xmin=20,
      ylabel=Diffraction Efficiency, % \lbrack a.u.\rbrack,x
%      yticklabels= , %supress the ylabel numbering
      ymax=1,
      ymin=0,
      mark=none,
      legend style={
        legend pos=north east,
        font=\tiny
      } 
    ]
      \pgfplotstableread{uni-holographic-eff.txt} 
      \teff      %  effs=efficiencies
      \addplot[color=blue,mark=none,smooth] table[y=one] from \teff;
      \addlegendentry{$m = -1$};
    \end{axis}
  \end{tikzpicture}
\end{document}

Thx in advance.

[feuersaenger]

Hi,

a very simple solution could be to reduce the sampling density by means of each nth point=5, for example

Code: Select all

\addplot[color=blue,mark=none,smooth,each nth point=5] table[y=one] from \teff;

this avoids the short edges. Perhaps it suffices?

Kind regards

Christian

[thinkpadT]

Hi,

that worked for me. thanks a lot.

-Fawad

[esalset]

I had the same problem and the solution also worked for me. Thanks!