LaTeX forum ⇒ Graphics, Figures & Tables ⇒ pgfplots | Smooth a Data Plot Topic is solved

[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] [Expand/Collapse] [Download] (untitled.tex)

\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] [Expand/Collapse] [Download] (untitled.tex)

\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!