\section{First\+Point\+Is\+Root Class Reference}
\label{classmlpack_1_1tree_1_1FirstPointIsRoot}\index{First\+Point\+Is\+Root@{First\+Point\+Is\+Root}}


This class is meant to be used as a choice for the policy class Root\+Point\+Policy of the \doxyref{Cover\+Tree}{p.}{classmlpack_1_1tree_1_1CoverTree} class.  


\subsection*{Static Public Member Functions}
\begin{DoxyCompactItemize}
\item 
{\footnotesize template$<$typename Mat\+Type $>$ }\\static size\+\_\+t \textbf{ Choose\+Root} (const Mat\+Type \&)
\begin{DoxyCompactList}\small\item\em Return the point to be used as the root point of the cover tree. \end{DoxyCompactList}\end{DoxyCompactItemize}


\subsection{Detailed Description}
This class is meant to be used as a choice for the policy class Root\+Point\+Policy of the \doxyref{Cover\+Tree}{p.}{classmlpack_1_1tree_1_1CoverTree} class. 

This policy determines which point is used for the root node of the cover tree. This particular implementation simply chooses the first point in the dataset as the root. A more complex implementation might choose, for instance, the point with least maximum distance to other points (the closest to the \char`\"{}middle\char`\"{}). 

Definition at line 29 of file first\+\_\+point\+\_\+is\+\_\+root.\+hpp.



\subsection{Member Function Documentation}
\mbox{\label{classmlpack_1_1tree_1_1FirstPointIsRoot_adffa07e18bd77e43cd8a1c196620f304}} 
\index{mlpack\+::tree\+::\+First\+Point\+Is\+Root@{mlpack\+::tree\+::\+First\+Point\+Is\+Root}!Choose\+Root@{Choose\+Root}}
\index{Choose\+Root@{Choose\+Root}!mlpack\+::tree\+::\+First\+Point\+Is\+Root@{mlpack\+::tree\+::\+First\+Point\+Is\+Root}}
\subsubsection{Choose\+Root()}
{\footnotesize\ttfamily static size\+\_\+t Choose\+Root (\begin{DoxyParamCaption}\item[{const Mat\+Type \&}]{ }\end{DoxyParamCaption})\hspace{0.3cm}{\ttfamily [inline]}, {\ttfamily [static]}}



Return the point to be used as the root point of the cover tree. 

This just returns 0. 

Definition at line 37 of file first\+\_\+point\+\_\+is\+\_\+root.\+hpp.



The documentation for this class was generated from the following file\+:\begin{DoxyCompactItemize}
\item 
/var/www/mlpack.\+ratml.\+org/mlpack.\+org/\+\_\+src/mlpack-\/3.\+3.\+2/src/mlpack/core/tree/cover\+\_\+tree/\textbf{ first\+\_\+point\+\_\+is\+\_\+root.\+hpp}\end{DoxyCompactItemize}