Hi Denis,there is a different solution which might work. I prepared it as low-level backend in order to implement a "nice, understandable interface in pgfplots"... however, it never made it that far and it is far from "nice, understandable".
It is a set of two hooks which is installed at the beginning and end of every bar. Combined with a bit of fine tuning, you get what you wanted...
Here is the code:
\documentclass{report}
\usepackage{pgfplots}
\pgfplotsset{compat=1.6}
\pgfplotsset{
shaded bars/.style={
point meta=y,
at begin bar={%
\pgfplotsaxisvisphasetransformpointmeta
\pgfplotscolormapdefinemappedcolor{\pgfplotspointmetatransformed}%
\begin{scope}[left color=black,right color=mapped color]%
\shade\pgfextra
},
at end bar={%
\endpgfextra;
\end{scope}%
},
},
}
\begin{document}
\thispagestyle{empty}
\begin{tikzpicture}
\begin{axis}[ybar]
\addplot+[
shaded bars,
colormap={test}{
color=(blue!10); color=(blue!20); color=(blue!30);
color=(blue!40); color=(blue!50); color=(blue!60);
color=(blue!70) },
]
plot coordinates {
(1,1565)
(2,1164)
(3,740)
(4,2273)
(5,1688)
(6,2942)
};
\end{axis}
\end{tikzpicture}
\end{document}
Attached is the result.
You see that I did something slightly more complicated: I shaded the
bars depending on the 'mapped color'. The 'shaded bars' style relies on
the two (currently undocumented) keys 'at begin bar' and 'at end bar'.
The two macros inside of it are mandatory; they take the "raw" point
meta; map them into the min/max range and define the 'mapped color'. The
rest is basically your example.
I always wanted to improve the bar plot handler systematically - once I find time to do it; this kind of functionality will also receive attention.
Kind regards Christian Am 06.06.2013 10:23, schrieb Denis Bitouzé:
Hello,
is there a way to get scatter (y)bar plots, I mean the bars filled
with a colour depending on the y values?
The following MCE doesn't give the expected result:
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\documentclass{article}
\usepackage{pgfplots}
\pgfplotsset{compat=1.8}
\begin{document}
\begin{tikzpicture}
\begin{axis}[ybar]
\addplot+[
colormap={test}{
color=(blue!10); color=(blue!20); color=(blue!30);
color=(blue!40); color=(blue!50); color=(blue!60); color=(blue!70) },
scatter/use mapped color={draw=blue,fill=mapped color}
]
plot coordinates {
(1,1565)
(2,1164)
(3,740)
(4,2273)
(5,1688)
(6,2942)
};
\end{axis}
\end{tikzpicture}
\end{document}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Thanks.
<<attachment: P.png>>
\documentclass{report}
\usepackage{pgfplots}
\pgfplotsset{compat=1.6}
\pgfplotsset{
shaded bars/.style={
point meta=y,
at begin bar={%
\pgfplotsaxisvisphasetransformpointmeta
\pgfplotscolormapdefinemappedcolor{\pgfplotspointmetatransformed}%
\begin{scope}[left color=black,right color=mapped color]%
\shade\pgfextra
},
at end bar={%
\endpgfextra;
\end{scope}%
},
},
}
\begin{document}
\thispagestyle{empty}
\begin{tikzpicture}
\begin{axis}[ybar]
\addplot+[
shaded bars,
colormap={test}{
color=(blue!10); color=(blue!20); color=(blue!30);
color=(blue!40); color=(blue!50); color=(blue!60); color=(blue!70) },
]
plot coordinates {
(1,1565)
(2,1164)
(3,740)
(4,2273)
(5,1688)
(6,2942)
};
\end{axis}
\end{tikzpicture}
\end{document}
------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev
_______________________________________________ Pgfplots-features mailing list Pgfplots-features@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pgfplots-features
