\section{Polynomial\+Kernel Class Reference}
\label{classmlpack_1_1kernel_1_1PolynomialKernel}\index{Polynomial\+Kernel@{Polynomial\+Kernel}}


The simple polynomial kernel.  


\subsection*{Public Member Functions}
\begin{DoxyCompactItemize}
\item 
\textbf{ Polynomial\+Kernel} (const double degree=2.\+0, const double offset=0.\+0)
\begin{DoxyCompactList}\small\item\em Construct the Polynomial Kernel with the given offset and degree. \end{DoxyCompactList}\item 
const double \& \textbf{ Degree} () const
\begin{DoxyCompactList}\small\item\em Get the degree of the polynomial. \end{DoxyCompactList}\item 
double \& \textbf{ Degree} ()
\begin{DoxyCompactList}\small\item\em Modify the degree of the polynomial. \end{DoxyCompactList}\item 
{\footnotesize template$<$typename Vec\+TypeA , typename Vec\+TypeB $>$ }\\double \textbf{ Evaluate} (const Vec\+TypeA \&a, const Vec\+TypeB \&b) const
\begin{DoxyCompactList}\small\item\em Simple evaluation of the dot product. \end{DoxyCompactList}\item 
const double \& \textbf{ Offset} () const
\begin{DoxyCompactList}\small\item\em Get the offset of the dot product of the arguments. \end{DoxyCompactList}\item 
double \& \textbf{ Offset} ()
\begin{DoxyCompactList}\small\item\em Modify the offset of the dot product of the arguments. \end{DoxyCompactList}\item 
{\footnotesize template$<$typename Archive $>$ }\\void \textbf{ serialize} (Archive \&ar, const unsigned int)
\begin{DoxyCompactList}\small\item\em Serialize the kernel. \end{DoxyCompactList}\end{DoxyCompactItemize}


\subsection{Detailed Description}
The simple polynomial kernel. 

For any two vectors $ x $, $ y $, $ degree $ and $ offset $,

\[ K(x, y) = (x^T * y + offset) ^ {degree}. \] 

Definition at line 28 of file polynomial\+\_\+kernel.\+hpp.



\subsection{Constructor \& Destructor Documentation}
\mbox{\label{classmlpack_1_1kernel_1_1PolynomialKernel_af759f8b4e6594aed10ad2cea9435aed2}} 
\index{mlpack\+::kernel\+::\+Polynomial\+Kernel@{mlpack\+::kernel\+::\+Polynomial\+Kernel}!Polynomial\+Kernel@{Polynomial\+Kernel}}
\index{Polynomial\+Kernel@{Polynomial\+Kernel}!mlpack\+::kernel\+::\+Polynomial\+Kernel@{mlpack\+::kernel\+::\+Polynomial\+Kernel}}
\subsubsection{Polynomial\+Kernel()}
{\footnotesize\ttfamily \textbf{ Polynomial\+Kernel} (\begin{DoxyParamCaption}\item[{const double}]{degree = {\ttfamily 2.0},  }\item[{const double}]{offset = {\ttfamily 0.0} }\end{DoxyParamCaption})\hspace{0.3cm}{\ttfamily [inline]}}



Construct the Polynomial Kernel with the given offset and degree. 

If the arguments are omitted, the default degree is 2 and the default offset is 0.


\begin{DoxyParams}{Parameters}
{\em offset} & Offset of the dot product of the arguments. \\
\hline
{\em degree} & Degree of the polynomial. \\
\hline
\end{DoxyParams}


Definition at line 38 of file polynomial\+\_\+kernel.\+hpp.



\subsection{Member Function Documentation}
\mbox{\label{classmlpack_1_1kernel_1_1PolynomialKernel_ad897bde89ec0a2ee23fcf7202063a86d}} 
\index{mlpack\+::kernel\+::\+Polynomial\+Kernel@{mlpack\+::kernel\+::\+Polynomial\+Kernel}!Degree@{Degree}}
\index{Degree@{Degree}!mlpack\+::kernel\+::\+Polynomial\+Kernel@{mlpack\+::kernel\+::\+Polynomial\+Kernel}}
\subsubsection{Degree()\hspace{0.1cm}{\footnotesize\ttfamily [1/2]}}
{\footnotesize\ttfamily const double\& Degree (\begin{DoxyParamCaption}{ }\end{DoxyParamCaption}) const\hspace{0.3cm}{\ttfamily [inline]}}



Get the degree of the polynomial. 



Definition at line 61 of file polynomial\+\_\+kernel.\+hpp.

\mbox{\label{classmlpack_1_1kernel_1_1PolynomialKernel_a62edea5a8a07e7d2b54f250f03007687}} 
\index{mlpack\+::kernel\+::\+Polynomial\+Kernel@{mlpack\+::kernel\+::\+Polynomial\+Kernel}!Degree@{Degree}}
\index{Degree@{Degree}!mlpack\+::kernel\+::\+Polynomial\+Kernel@{mlpack\+::kernel\+::\+Polynomial\+Kernel}}
\subsubsection{Degree()\hspace{0.1cm}{\footnotesize\ttfamily [2/2]}}
{\footnotesize\ttfamily double\& Degree (\begin{DoxyParamCaption}{ }\end{DoxyParamCaption})\hspace{0.3cm}{\ttfamily [inline]}}



Modify the degree of the polynomial. 



Definition at line 63 of file polynomial\+\_\+kernel.\+hpp.

\mbox{\label{classmlpack_1_1kernel_1_1PolynomialKernel_a84c3aeba25ea7703bd2d4f85a54301da}} 
\index{mlpack\+::kernel\+::\+Polynomial\+Kernel@{mlpack\+::kernel\+::\+Polynomial\+Kernel}!Evaluate@{Evaluate}}
\index{Evaluate@{Evaluate}!mlpack\+::kernel\+::\+Polynomial\+Kernel@{mlpack\+::kernel\+::\+Polynomial\+Kernel}}
\subsubsection{Evaluate()}
{\footnotesize\ttfamily double Evaluate (\begin{DoxyParamCaption}\item[{const Vec\+TypeA \&}]{a,  }\item[{const Vec\+TypeB \&}]{b }\end{DoxyParamCaption}) const\hspace{0.3cm}{\ttfamily [inline]}}



Simple evaluation of the dot product. 

This evaluation uses Armadillo\textquotesingle{}s dot() function.


\begin{DoxyTemplParams}{Template Parameters}
{\em Vec\+TypeA} & Type of first vector (should be arma\+::vec or arma\+::sp\+\_\+vec). \\
\hline
{\em Vec\+TypeB} & Type of second vector (arma\+::vec / arma\+::sp\+\_\+vec). \\
\hline
\end{DoxyTemplParams}

\begin{DoxyParams}{Parameters}
{\em a} & First vector. \\
\hline
{\em b} & Second vector. \\
\hline
\end{DoxyParams}
\begin{DoxyReturn}{Returns}
K(a, b). 
\end{DoxyReturn}


Definition at line 55 of file polynomial\+\_\+kernel.\+hpp.

\mbox{\label{classmlpack_1_1kernel_1_1PolynomialKernel_a9e3dd48cd75fe62a88d7d5a74a31aef0}} 
\index{mlpack\+::kernel\+::\+Polynomial\+Kernel@{mlpack\+::kernel\+::\+Polynomial\+Kernel}!Offset@{Offset}}
\index{Offset@{Offset}!mlpack\+::kernel\+::\+Polynomial\+Kernel@{mlpack\+::kernel\+::\+Polynomial\+Kernel}}
\subsubsection{Offset()\hspace{0.1cm}{\footnotesize\ttfamily [1/2]}}
{\footnotesize\ttfamily const double\& Offset (\begin{DoxyParamCaption}{ }\end{DoxyParamCaption}) const\hspace{0.3cm}{\ttfamily [inline]}}



Get the offset of the dot product of the arguments. 



Definition at line 66 of file polynomial\+\_\+kernel.\+hpp.

\mbox{\label{classmlpack_1_1kernel_1_1PolynomialKernel_a37ef08fdb2295b040e6c3a59cf907249}} 
\index{mlpack\+::kernel\+::\+Polynomial\+Kernel@{mlpack\+::kernel\+::\+Polynomial\+Kernel}!Offset@{Offset}}
\index{Offset@{Offset}!mlpack\+::kernel\+::\+Polynomial\+Kernel@{mlpack\+::kernel\+::\+Polynomial\+Kernel}}
\subsubsection{Offset()\hspace{0.1cm}{\footnotesize\ttfamily [2/2]}}
{\footnotesize\ttfamily double\& Offset (\begin{DoxyParamCaption}{ }\end{DoxyParamCaption})\hspace{0.3cm}{\ttfamily [inline]}}



Modify the offset of the dot product of the arguments. 



Definition at line 68 of file polynomial\+\_\+kernel.\+hpp.

\mbox{\label{classmlpack_1_1kernel_1_1PolynomialKernel_af0dd9205158ccf7bcfcd8ff81f79c927}} 
\index{mlpack\+::kernel\+::\+Polynomial\+Kernel@{mlpack\+::kernel\+::\+Polynomial\+Kernel}!serialize@{serialize}}
\index{serialize@{serialize}!mlpack\+::kernel\+::\+Polynomial\+Kernel@{mlpack\+::kernel\+::\+Polynomial\+Kernel}}
\subsubsection{serialize()}
{\footnotesize\ttfamily void serialize (\begin{DoxyParamCaption}\item[{Archive \&}]{ar,  }\item[{const unsigned}]{int }\end{DoxyParamCaption})\hspace{0.3cm}{\ttfamily [inline]}}



Serialize the kernel. 



Definition at line 72 of file polynomial\+\_\+kernel.\+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.\+1/src/mlpack/core/kernels/\textbf{ polynomial\+\_\+kernel.\+hpp}\end{DoxyCompactItemize}