Hi Ihor,
this is effectively the same problem as with the text depth: the legend
style is inherited by your plot mark.
The only way to solve it is to set all involved options explicitly. In
this case, the option "anchor=center" fixes the problem:
\pgfdeclareplotmark{e}
{\filldraw[fill=white,draw=black] (0pt,0pt) circle [radius=3pt]
node[anchor=center,text depth=0pt] {\scriptsize e};}
Kind regards
Christian
Am 19.03.2014 18:09, schrieb Ihor Rokach:
> Dear Christian,
>
> Thank you very much for your very kind answer. After your correction
> everything is OK with my plot until any kind of horizontal alignment
> of the legend is used. Unfortunately, either "legend cell align=left"
> (used in the example below) or "legend cell align=right" shifts letter
> 'e' out of the circle in the legend. I have tried to control letter
> 'e' position using 'align=' key of the node in pgfdeclareplotmark
> without any success. Is it a bug or (very advanced) feature?
>
> \documentclass[tikz]{standalone}
> \usepackage{pgfplots}
> \pgfplotsset{compat=newest}
>
> \pgfdeclareplotmark{e}
> {\filldraw[fill=white,draw=black] (0pt,0pt) circle [radius=3pt]
> node[text depth=0pt] {\scriptsize e};}
>
> \begin{document}
> \thispagestyle{empty}
> \begin{tikzpicture}
> \begin{axis}[legend cell align=left] %% alignment of the legend
> \addplot[mark=e] coordinates {(0,1) (1,0)};
> \addlegendentry{test}
> \end{axis}
> \end{tikzpicture}
> \end{document}
>
> With best wishes
> ,
> =========
> I
> hor
>
>
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