I would like to add an annotation, or better, an arrow to a particular ybar in a plot, but I am struggling with the symbolic x data. I've used \pgfplotsinvokeforeach to read in variable data, and so haven't explicitly defined the x values. Whenever I try to specify the coordinates with eg \node[coordinate,pin=right:{Tasmania entry to NEM}] at (axis cs:2004/5,190) {}; I get an error (not a floating point value), so I have had to use the numeric value of 0 which places my comment roughly in the right place.
The question is – how to specify the correct node so that it will be placed at the top of the desired bar? The working example is below – but I would like to place the comment at the top and left of the 2005/6 y bar.
\documentclass{article}
\usepackage{pgfplotstable}
\usepackage{tikz}
\usepackage{pgfplots}
\pgfplotsset{compat=newest}
\begin{document}
\pgfplotsset{
select row/.style={
x filter/.code={\ifnum\coordindex=#1\else\def\pgfmathresult{}\fi}
}
}
\pgfplotstableread[col sep=comma,header=false]{
1999/00,167.1
2000/1,172.5
2001/2,175
2002/3,179.3
2003/4,184.4
2004/5,188
2005/6,201.7
2006/7,208.3
2007/8,210.2
2008/9,210.5
2009/10,209.8
2010/11,207.5
2011/12,203.4
2012/13,198.2
%2013/14(YTD),97
}\datatable
\begin{tikzpicture}[scale=0.8]
\begin{axis}[
%title=Australia's Primary Energy Consumption by sector - 2012,
ybar, bar shift=0pt,
enlarge y limits=0.1,
%xmin=0,
xtick={0,...,13},
xticklabels from table={\datatable}{0},
ymajorgrids = true,
bar width=3mm,
width=12cm, height=9cm,
xlabel={year},
ylabel={TWh},
x tick label style={font=\footnotesize,rotate=45, anchor=east},
nodes near coords align={horizontal},
]
\pgfplotsinvokeforeach{0,...,13}{
\addplot table [x expr=\coordindex, select row=#1] {\datatable};
}
\node[coordinate,pin=right:{Tasmania entry to NEM}] at (axis cs:0,190) {};
\end{axis}
\end{tikzpicture}
\end{document}
Best Answer
This is one possible solution. Here a pin is added so that the label for bar is clearly pointed.
Code