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%
% pareto.tex
%
\renewcommand{\thisname}{Chart::Pareto}
\section{\thisname}
\name{\thisname}
\file{Pareto.pm}
\requires{Chart::Base, GD, Carp, FileHandle}
\begin{Description}
The class \thisclass creates a Pareto chart, \ie, a set of absolute
values overlaid with a line chart of the accumulated values. (This
latter curve is also known as an \emph{empirical cumulative distribution
function} or as a \emph{Lorenz curve}.) This representation usually
makes sense only if the values are sorted (either in ascending or in
descending order). \thisclass plots only one data set and its labels.
\thisclass is a subclass of \class{Chart::Base}.
\end{Description}
\example
\begin{figure}[ht]
\begin{center}
\includegraphics[scale=0.7]{d_pareto2.png}
\end{center}
\caption{Pareto chart}
\label{fig:pareto}
\end{figure}
\begin{verbatim}
use Chart::Pareto;
$g = Chart::Pareto->new(500,400);
$g->add_dataset('1st week', '2nd week', '3rd week', '4th week',
'5th week', '6th week', '7th week', '8th week',
'9th week', '10th week');
$g->add_dataset(37, 15, 9, 4, 3.5, 2.1, 1.2, 1.5, 6.2, 16);
%hash = ('colors' => { 'dataset0' => 'mauve',
'dataset1' => 'light_blue',
'title' => 'orange'
},
'title' => 'Visitors at the Picasso Exhibition',
'integer_ticks_only' => 'true',
'skip_int_ticks' => 5,
'grey_background' => 'false',
'max_val' => 100,
'y_label' => 'Visitors in Thousands',
'x_ticks' => 'vertical',
'spaced_bars' => 'true',
'legend' => 'none'
);
$g->set(%hash);
$g->png("pareto.png");
\end{verbatim}
\constructorblurb{\thisname}
\begin{AttrDecl}{sort}
Sorts the data in ascending order if set to \literal{true}. Should be set if
the input data is not sorted. Defaults to \literal{false}.
\end{AttrDecl}
\begin{AttrDecl}{spaced\_bars}
Leaves some space between each group of bars when set to \literal{true}. This
usually make it easier to read a bar chart. Default is \literal{true}.
\end{AttrDecl}
\begin{AttrDecl}{y\_axes}
Tells \thisclass where to place the $y$ axis. Valid
values are \literal{left}, \literal{right} and \literal{both}. Defaults
to \literal{left}.
\end{AttrDecl}
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