Graphics, Figures & Tables ⇒ pgfplots | Wrong Marks in Legend

[kat_e]

I'm using pgfplots to plot the below data with their linear regression. The problem I'm encountering is that the markers are filled black in the graph but empty in the legend. Does anyone know where the incorrect code is?

Code: Select all

\documentclass[10pt,a4paper]{report}
\usepackage{pgfplots,pgfplotstable}

\begin{document}
  \begin{figure}
    \centering
    \begin{tikzpicture}
      \begin{axis}[
        legend image post style={},
        ylabel=Apparent density{,} $g\,cm^{-3}$,
        xlabel=Schopper-Riegler drainability{,} \emph{SR},
        legend entries={Reference, NaOH}, 
        legend style={
          at={(0.97,0.35)},
          cells={anchor=west}
        }
      ]
       \addplot [only marks] table [x=X,y=Y]{data/chap4/RF_wetness_density.dat};
       \addplot [no markers, forget plot] table [x=X,y={create col/linear regression={y=Y}}]{data/chap4/RF_wetness_density.dat};
       \addplot [only marks, mark=square*] table [x=X,y=Y]{data/chap4/SH_wetness_density.dat};
       \addplot [no markers, forget plot] table [x=X,y={create col/linear regression={y=Y}}]{data/chap4/SH_wetness_density.dat};
      \end{axis}
    \end{tikzpicture}
  \end{figure}
\end{document}

The data tables are:

The file "RF_wetness_density.dat"

Code: Select all

X	Y	
21	0.34
42	0.41
65	0.47
78	0.50
82	0.54

The file "SH_wetness_density.dat"

Code: Select all

X	Y
11	0.31
23	0.38
30	0.43
54	0.49
68	0.52

[localghost]

Seems to be a bug. I'd suggest to write a note to the package maintainer. He's also a member of this board and visits quite regularly.


Thorsten

[kat_e]

thanks Thorsten. I've sent a message to him now.

kind regards,
Katie

[kat_e]

Found it! Forgot to put a "+" after \addplot so correct code would be

Code: Select all

\documentclass[a4paper,10pt]{report}
\usepackage{pgfplots,pgfplotstable}


\begin{document}

 \begin{figure}
\centering

\begin{tikzpicture}
\begin{axis}[legend image post style={}
,ylabel=Apparent density{,} $g\,cm^{-3}$,xlabel=Schopper-Riegler drainability{,} \emph{SR},legend entries={Reference, NaOH}, 
legend style={at={(0.97,0.35)}, cells={anchor=west}
}]

\addplot+[only marks] table [x=X,y=Y]{data/chap4/RF_wetness_density.dat};
\addplot+[no markers, forget plot] table [x=X,y={create col/linear regression={y=Y}}]{data/chap4/RF_wetness_density.dat};
\addplot+[only marks, mark=square*] table [x=X,y=Y]{data/chap4/SH_wetness_density.dat};
\addplot+[no markers, forget plot] table [x=X,y={create col/linear regression={y=Y}}]{data/chap4/SH_wetness_density.dat};

\end{axis}

\end{tikzpicture}
 
\end{figure}

\end{document}

Kind regards,
Katie