\section{mlpack\+:\+:det Namespace Reference}
\label{namespacemlpack_1_1det}\index{mlpack\+::det@{mlpack\+::det}}


Density Estimation Trees.  


\subsection*{Classes}
\begin{DoxyCompactItemize}
\item 
class \textbf{ D\+Tree}
\begin{DoxyCompactList}\small\item\em A density estimation tree is similar to both a decision tree and a space partitioning tree (like a kd-\/tree). \end{DoxyCompactList}\item 
class \textbf{ Path\+Cacher}
\begin{DoxyCompactList}\small\item\em This class is responsible for caching the path to each node of the tree. \end{DoxyCompactList}\end{DoxyCompactItemize}
\subsection*{Functions}
\begin{DoxyCompactItemize}
\item 
{\footnotesize template$<$typename Mat\+Type , typename Tag\+Type $>$ }\\void \textbf{ Print\+Leaf\+Membership} (\textbf{ D\+Tree}$<$ Mat\+Type, Tag\+Type $>$ $\ast$dtree, const Mat\+Type \&data, const arma\+::\+Mat$<$ size\+\_\+t $>$ \&labels, const size\+\_\+t num\+Classes, const std\+::string \&leaf\+Class\+Membership\+File=\char`\"{}\char`\"{})
\begin{DoxyCompactList}\small\item\em Print the membership of leaves of a density estimation tree given the labels and number of classes. \end{DoxyCompactList}\item 
{\footnotesize template$<$typename Mat\+Type , typename Tag\+Type $>$ }\\void \textbf{ Print\+Variable\+Importance} (const \textbf{ D\+Tree}$<$ Mat\+Type, Tag\+Type $>$ $\ast$dtree, const std\+::string vi\+File=\char`\"{}\char`\"{})
\begin{DoxyCompactList}\small\item\em Print the variable importance of each dimension of a density estimation tree. \end{DoxyCompactList}\item 
{\footnotesize template$<$typename Mat\+Type , typename Tag\+Type $>$ }\\\textbf{ D\+Tree}$<$ Mat\+Type, Tag\+Type $>$ $\ast$ \textbf{ Trainer} (Mat\+Type \&dataset, const size\+\_\+t folds, const bool use\+Volume\+Reg=false, const size\+\_\+t max\+Leaf\+Size=10, const size\+\_\+t min\+Leaf\+Size=5, const std\+::string unpruned\+Tree\+Output=\char`\"{}\char`\"{}, const bool skip\+Pruning=false)
\begin{DoxyCompactList}\small\item\em Train the optimal decision tree using cross-\/validation with the given number of folds. \end{DoxyCompactList}\end{DoxyCompactItemize}


\subsection{Detailed Description}
Density Estimation Trees. 

\subsection{Function Documentation}
\mbox{\label{namespacemlpack_1_1det_a0671a10d605707a02c14efa54a2e16f0}} 
\index{mlpack\+::det@{mlpack\+::det}!Print\+Leaf\+Membership@{Print\+Leaf\+Membership}}
\index{Print\+Leaf\+Membership@{Print\+Leaf\+Membership}!mlpack\+::det@{mlpack\+::det}}
\subsubsection{Print\+Leaf\+Membership()}
{\footnotesize\ttfamily void mlpack\+::det\+::\+Print\+Leaf\+Membership (\begin{DoxyParamCaption}\item[{\textbf{ D\+Tree}$<$ Mat\+Type, Tag\+Type $>$ $\ast$}]{dtree,  }\item[{const Mat\+Type \&}]{data,  }\item[{const arma\+::\+Mat$<$ size\+\_\+t $>$ \&}]{labels,  }\item[{const size\+\_\+t}]{num\+Classes,  }\item[{const std\+::string \&}]{leaf\+Class\+Membership\+File = {\ttfamily \char`\"{}\char`\"{}} }\end{DoxyParamCaption})}



Print the membership of leaves of a density estimation tree given the labels and number of classes. 

Optionally, pass the name of a file to print this information to (otherwise stdout is used).


\begin{DoxyParams}{Parameters}
{\em dtree} & Tree to print membership of. \\
\hline
{\em data} & Dataset tree is built upon. \\
\hline
{\em labels} & Class labels of dataset. \\
\hline
{\em num\+Classes} & Number of classes in dataset. \\
\hline
{\em leaf\+Class\+Membership\+File} & Name of file to print to (optional). \\
\hline
\end{DoxyParams}
\mbox{\label{namespacemlpack_1_1det_ac64804c6c73b842b3eb69d9a64fb12e3}} 
\index{mlpack\+::det@{mlpack\+::det}!Print\+Variable\+Importance@{Print\+Variable\+Importance}}
\index{Print\+Variable\+Importance@{Print\+Variable\+Importance}!mlpack\+::det@{mlpack\+::det}}
\subsubsection{Print\+Variable\+Importance()}
{\footnotesize\ttfamily void mlpack\+::det\+::\+Print\+Variable\+Importance (\begin{DoxyParamCaption}\item[{const \textbf{ D\+Tree}$<$ Mat\+Type, Tag\+Type $>$ $\ast$}]{dtree,  }\item[{const std\+::string}]{vi\+File = {\ttfamily \char`\"{}\char`\"{}} }\end{DoxyParamCaption})}



Print the variable importance of each dimension of a density estimation tree. 

Optionally, pass the name of a file to print this information to (otherwise stdout is used).


\begin{DoxyParams}{Parameters}
{\em dtree} & Density tree to use. \\
\hline
{\em vi\+File} & Name of file to print to (optional). \\
\hline
\end{DoxyParams}
\mbox{\label{namespacemlpack_1_1det_a4a84945ed0d2a629c86f8538e6e7090c}} 
\index{mlpack\+::det@{mlpack\+::det}!Trainer@{Trainer}}
\index{Trainer@{Trainer}!mlpack\+::det@{mlpack\+::det}}
\subsubsection{Trainer()}
{\footnotesize\ttfamily \textbf{ D\+Tree}$<$Mat\+Type, Tag\+Type$>$$\ast$ mlpack\+::det\+::\+Trainer (\begin{DoxyParamCaption}\item[{Mat\+Type \&}]{dataset,  }\item[{const size\+\_\+t}]{folds,  }\item[{const bool}]{use\+Volume\+Reg = {\ttfamily false},  }\item[{const size\+\_\+t}]{max\+Leaf\+Size = {\ttfamily 10},  }\item[{const size\+\_\+t}]{min\+Leaf\+Size = {\ttfamily 5},  }\item[{const std\+::string}]{unpruned\+Tree\+Output = {\ttfamily \char`\"{}\char`\"{}},  }\item[{const bool}]{skip\+Pruning = {\ttfamily false} }\end{DoxyParamCaption})}



Train the optimal decision tree using cross-\/validation with the given number of folds. 

Optionally, give a filename to print the unpruned tree to. This initializes a tree on the heap, so you are responsible for deleting it.


\begin{DoxyParams}{Parameters}
{\em dataset} & Dataset for the tree to use. \\
\hline
{\em folds} & Number of folds to use for cross-\/validation. \\
\hline
{\em use\+Volume\+Reg} & If true, use volume regularization. \\
\hline
{\em max\+Leaf\+Size} & Maximum number of points allowed in a leaf. \\
\hline
{\em min\+Leaf\+Size} & Minimum number of points allowed in a leaf. \\
\hline
{\em unpruned\+Tree\+Output} & Filename to print unpruned tree to (optional). \\
\hline
{\em skip\+Pruning} & Set true to skip pruning. \\
\hline
\end{DoxyParams}