Graphics, Figures & Tables ⇒ Alter Frequency of Plot Markers

[sderijck]

Hello,

I try to change the frequency of plot markers. To be more precisely: I create a figure in which six graphs are depicted. To distinguish the graphs from each other, I use solid and dashed lines with a different gray scale, but I also want to add markers. However, these markers should not appear for each data entry (thus sample), but let's say every 50 samples one marker. This is to avoid a chaotic figure, because there are around 600 data entries, for each time step one. I have added the code below.

Code: Select all

\documentclass[conference]{IEEEtran}
\usepackage{pgfplots}
\usepackage{tikz}
\usetikzlibrary{plotmarks}

\begin{document}
  \begin{figure*}[!t]
    \centering
    \begin{tikzpicture}
      \begin{axis}[
        xmin=0,
        xmax=600,
        width=18cm,
        height=8cm,
        legend pos=north east,
        xlabel = Time {[sec]},
        ylabel = Power {[p.u.]}
      ]
        \addplot[solid,color=black!30!white] file {./data/M2T1opt.dat};
        \addlegendentry{\footnotesize Turbine 1};
        \addplot[dashed,color=black!30!white] file {./data/M2T1optO2.dat};
        \addlegendentry{\footnotesize Turbine 1};
        \addplot[solid,color=black!70!white] file {./data/M2T2opt.dat};
        \addlegendentry{\footnotesize Turbine 2};
        \addplot[dashed,color=black!70!white] file {./data/M2T2optO2.dat};
        \addlegendentry{\footnotesize Turbine 2};
        \addplot[solid,mark=none,color=black] file {./data/M2Topt.dat};
        \addlegendentry{\footnotesize 2 turbines};
        \addplot[dashed,mark=none,color=black] file {./data/M2ToptO2.dat};
        \addlegendentry{\footnotesize 2 turbines};
      \end{axis}
    \end{tikzpicture}
  \end{figure*}
\end{document}

Does anyone have a good suggestion for this problem?

Many thanks for your help

Simon

[svend_tveskaeg]

Welcome to the board!

1. Please provide a minimal working example.
2. You can tag the code as such by clicking the

   Code: Select all

    button just above the window where the type the text for the post.
   [*]I can see that you are working with some external data files. You should attached these to your post.[/list]
   
   P.S. When this is said, I don't know Ti[i]k[/i]Z so I can't you with the specific problem; sorry. I am sure others can help, though.

[localghost]

[…] To distinguish the graphs from each other, I use solid lines with a different gray scale, but I also want to add markers. However, these markers should not appear for each data entry (thus sample), but let's say every 50 samples one marker. […]

In Section 4.6.1 the pgfplots manual introduces the key mark repeat as option for the \addplot command. To make this visible in your plots, just add some settings for the markers. The below example does that for the first plot. The output is attached.

Code: Select all

\documentclass[11pt]{article}
\usepackage[T1]{fontenc}
\usepackage{pgfplots}
\usetikzlibrary{plotmarks}

\pgfplotsset{
  compat=newest,
  xlabel near ticks,
  ylabel near ticks
}

\begin{document}
  \begin{tikzpicture}
    \begin{axis}[
      width=18cm,
      height=8cm,
      xmin=0,
      xmax=600,
      xlabel={Time [sec]},
      ylabel={Power [p.u.]},
      legend pos=north east,
      legend style={font=\footnotesize}
    ]
      \addplot[solid,mark=*,mark repeat=10,color=black!30!white] file {./data/M2T1opt.dat};
      \addlegendentry{Turbine 1};
      \addplot[dashed,color=black!30!white] file {./data/M2T1optO2.dat};
      \addlegendentry{Turbine 1};
      \addplot[solid,color=black!70!white] file {./data/M2T2opt.dat};
      \addlegendentry{Turbine 2};
      \addplot[dashed,color=black!70!white] file {./data/M2T2optO2.dat};
      \addlegendentry{Turbine 2};
      \addplot[solid,mark=none,color=black] file {./data/M2Topt.dat};
      \addlegendentry{2 turbines};
      \addplot[dashed,mark=none,color=black] file {./data/M2ToptO2.dat};
      \addlegendentry{2 turbines};
    \end{axis}
  \end{tikzpicture}
\end{document}

This way the markers will also be shown in the legend. And perhaps you want to use some other line styles listed in Section 4.6.2 of the package manual.


Best regards and welcome to the board
Thorsten

[sderijck]

Thank you for the quick help!

I should have checked the manual updates. In the old manual it is mentioned somewhere hidden.

Kind regards
Simon