[Tex/LaTex] Missing bars in bar chart

bar charttechnical-drawingtikz-pgf

I am trying to draw a bar chart in which each independent variable has multiple bars showing its performance in different areas. The problem I am having here is that the bars for the third variable is not showing up. The code I am using is shown below

\begin{center}
\begin{tikzpicture}
\begin{axis}[
x tick label style={
/pgf/number format/1000 sep=},
ylabel=Passenger Count,
enlargelimits=0.05,
legend style={at={(0.5,-0.15)},
anchor=north,legend columns=-1},
ybar interval=0.5,
symbolic x coords={1st Class, 2nd Class, 3rd Class},
grid=major
]
\addplot coordinates {(1st Class,6) (2nd Class,6) (3rd Class,324)};
\addplot coordinates {(1st Class,0) (2nd Class,98) (3rd Class,81)};
\addplot coordinates {(1st Class,41) (2nd Class,56) (3rd Class,45)};
\addplot coordinates {(1st Class,169) (2nd Class,24) (3rd Class,41)};
\legend{0-10,10-20,20-30,$>30$}
\end{axis}
\end{tikzpicture}
\end{center}

Best Answer

This happens because you're using ybar interval: This style requires a start and and end value for the x coordinates of each bar, so if you have three x coordinates, only two bars are drawn. In plot with several series, this style doesn't usually make much sense. Use ybar instead:

\documentclass{article}
\usepackage{pgfplots}

\begin{document}
\begin{center}
\begin{tikzpicture}
\begin{axis}[
ylabel=Passenger Count,
enlarge x limits=0.2,
legend style={
    at={(0.5,-0.15)},
    anchor=north,legend columns=-1
},
ymin=0,
ybar,
xtick=data,
symbolic x coords={1st Class, 2nd Class, 3rd Class},
grid=major,
xmajorgrids=false
]
\addplot coordinates {(1st Class,6) (2nd Class,6) (3rd Class,324)};
\addplot coordinates {(1st Class,0) (2nd Class,98) (3rd Class,81)};
\addplot coordinates {(1st Class,41) (2nd Class,56) (3rd Class,45)};
\addplot coordinates {(1st Class,169) (2nd Class,24) (3rd Class,41)};
\legend{0-10,10-20,20-30,$>30$}
\end{axis}
\end{tikzpicture}
\end{center}
\end{document}
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