\section{Simple\+Weight\+Update Class Reference}
\label{classmlpack_1_1perceptron_1_1SimpleWeightUpdate}\index{Simple\+Weight\+Update@{Simple\+Weight\+Update}}
\subsection*{Public Member Functions}
\begin{DoxyCompactItemize}
\item 
{\footnotesize template$<$typename Vec\+Type $>$ }\\void \textbf{ Update\+Weights} (const Vec\+Type \&training\+Point, arma\+::mat \&weights, arma\+::vec \&biases, const size\+\_\+t incorrect\+Class, const size\+\_\+t correct\+Class, const double instance\+Weight=1.\+0)
\begin{DoxyCompactList}\small\item\em This function is called to update the weight\+Vectors matrix. \end{DoxyCompactList}\end{DoxyCompactItemize}


\subsection{Detailed Description}


Definition at line 30 of file simple\+\_\+weight\+\_\+update.\+hpp.



\subsection{Member Function Documentation}
\mbox{\label{classmlpack_1_1perceptron_1_1SimpleWeightUpdate_a7b1c46d63b5a01a38e99ec033bfbe078}} 
\index{mlpack\+::perceptron\+::\+Simple\+Weight\+Update@{mlpack\+::perceptron\+::\+Simple\+Weight\+Update}!Update\+Weights@{Update\+Weights}}
\index{Update\+Weights@{Update\+Weights}!mlpack\+::perceptron\+::\+Simple\+Weight\+Update@{mlpack\+::perceptron\+::\+Simple\+Weight\+Update}}
\subsubsection{Update\+Weights()}
{\footnotesize\ttfamily void Update\+Weights (\begin{DoxyParamCaption}\item[{const Vec\+Type \&}]{training\+Point,  }\item[{arma\+::mat \&}]{weights,  }\item[{arma\+::vec \&}]{biases,  }\item[{const size\+\_\+t}]{incorrect\+Class,  }\item[{const size\+\_\+t}]{correct\+Class,  }\item[{const double}]{instance\+Weight = {\ttfamily 1.0} }\end{DoxyParamCaption})\hspace{0.3cm}{\ttfamily [inline]}}



This function is called to update the weight\+Vectors matrix. 

It decreases the weights of the incorrectly classified class while increasing the weight of the correct class it should have been classified to.


\begin{DoxyTemplParams}{Template Parameters}
{\em Type} & of vector (should be an Armadillo vector like arma\+::vec or arma\+::sp\+\_\+vec or something similar). \\
\hline
\end{DoxyTemplParams}

\begin{DoxyParams}{Parameters}
{\em training\+Point} & Point that was misclassified. \\
\hline
{\em weights} & Matrix of weights. \\
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{\em biases} & Vector of biases. \\
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{\em incorrect\+Class} & Index of class that the point was incorrectly classified as. \\
\hline
{\em correct\+Class} & Index of the true class of the point. \\
\hline
{\em instance\+Weight} & Weight to be given to this particular point during training (this is useful for boosting). \\
\hline
\end{DoxyParams}


Definition at line 50 of file simple\+\_\+weight\+\_\+update.\+hpp.



The documentation for this class was generated from the following file\+:\begin{DoxyCompactItemize}
\item 
/var/www/mlpack.\+ratml.\+org/mlpack.\+org/\+\_\+src/mlpack-\/git/src/mlpack/methods/perceptron/learning\+\_\+policies/\textbf{ simple\+\_\+weight\+\_\+update.\+hpp}\end{DoxyCompactItemize}