\section{Combined\+Normalization$<$ Normalization\+Types $>$ Class Template Reference}
\label{classmlpack_1_1cf_1_1CombinedNormalization}\index{Combined\+Normalization$<$ Normalization\+Types $>$@{Combined\+Normalization$<$ Normalization\+Types $>$}}


This normalization class performs a sequence of normalization methods on raw ratings.  


\subsection*{Public Types}
\begin{DoxyCompactItemize}
\item 
using \textbf{ Tuple\+Type} = std\+::tuple$<$ Normalization\+Types... $>$
\end{DoxyCompactItemize}
\subsection*{Public Member Functions}
\begin{DoxyCompactItemize}
\item 
\textbf{ Combined\+Normalization} ()
\item 
double \textbf{ Denormalize} (const size\+\_\+t user, const size\+\_\+t item, const double rating) const
\begin{DoxyCompactList}\small\item\em Denormalize rating by calling \doxyref{Denormalize()}{p.}{classmlpack_1_1cf_1_1CombinedNormalization_a27ffe74669d0dfd1c217728c369b35f9} in each normalization object. \end{DoxyCompactList}\item 
void \textbf{ Denormalize} (const arma\+::\+Mat$<$ size\+\_\+t $>$ \&combinations, arma\+::vec \&predictions) const
\begin{DoxyCompactList}\small\item\em Denormalize rating by calling \doxyref{Denormalize()}{p.}{classmlpack_1_1cf_1_1CombinedNormalization_a27ffe74669d0dfd1c217728c369b35f9} in each normalization object. \end{DoxyCompactList}\item 
const \textbf{ Tuple\+Type} \& \textbf{ Normalizations} () const
\begin{DoxyCompactList}\small\item\em Return normalizations tuple. \end{DoxyCompactList}\item 
{\footnotesize template$<$typename Mat\+Type $>$ }\\void \textbf{ Normalize} (Mat\+Type \&data)
\begin{DoxyCompactList}\small\item\em Normalize the data by calling \doxyref{Normalize()}{p.}{classmlpack_1_1cf_1_1CombinedNormalization_a47ac5da06a1301c0c72529184cc77a7e} in each normalization object. \end{DoxyCompactList}\item 
{\footnotesize template$<$typename Archive $>$ }\\void \textbf{ serialize} (Archive \&ar, const unsigned int version)
\begin{DoxyCompactList}\small\item\em Serialization. \end{DoxyCompactList}\end{DoxyCompactItemize}


\subsection{Detailed Description}
\subsubsection*{template$<$typename... Normalization\+Types$>$\newline
class mlpack\+::cf\+::\+Combined\+Normalization$<$ Normalization\+Types $>$}

This normalization class performs a sequence of normalization methods on raw ratings. 

An example of how to use \doxyref{Combined\+Normalization}{p.}{classmlpack_1_1cf_1_1CombinedNormalization} in CF is shown below\+:


\begin{DoxyCode}
\textcolor{keyword}{extern} arma::mat data; \textcolor{comment}{// data is a (user, item, rating) table.}
\textcolor{comment}{// Users for whom recommendations are generated.}
\textcolor{keyword}{extern} arma::Col<size\_t> users;
arma::Mat<size\_t> recommendations; \textcolor{comment}{// Resulting recommendations.}

CFType<NMFPolicy,
       CombinedNormalization<
           OverallMeanNormalization,
           UserMeanNormalization,
           ItemMeanNormalization>> cf(data);

\textcolor{comment}{// Generate 10 recommendations for all users.}
cf.GetRecommendations(10, recommendations);
\end{DoxyCode}
 

Definition at line 44 of file combined\+\_\+normalization.\+hpp.



\subsection{Member Typedef Documentation}
\mbox{\label{classmlpack_1_1cf_1_1CombinedNormalization_a1e98d43da1ec47c76125e7782460aa2c}} 
\index{mlpack\+::cf\+::\+Combined\+Normalization@{mlpack\+::cf\+::\+Combined\+Normalization}!Tuple\+Type@{Tuple\+Type}}
\index{Tuple\+Type@{Tuple\+Type}!mlpack\+::cf\+::\+Combined\+Normalization@{mlpack\+::cf\+::\+Combined\+Normalization}}
\subsubsection{Tuple\+Type}
{\footnotesize\ttfamily using \textbf{ Tuple\+Type} =  std\+::tuple$<$Normalization\+Types...$>$}



Definition at line 47 of file combined\+\_\+normalization.\+hpp.



\subsection{Constructor \& Destructor Documentation}
\mbox{\label{classmlpack_1_1cf_1_1CombinedNormalization_a8fb4e3fa10e0ecf786c2b710175bb75b}} 
\index{mlpack\+::cf\+::\+Combined\+Normalization@{mlpack\+::cf\+::\+Combined\+Normalization}!Combined\+Normalization@{Combined\+Normalization}}
\index{Combined\+Normalization@{Combined\+Normalization}!mlpack\+::cf\+::\+Combined\+Normalization@{mlpack\+::cf\+::\+Combined\+Normalization}}
\subsubsection{Combined\+Normalization()}
{\footnotesize\ttfamily \textbf{ Combined\+Normalization} (\begin{DoxyParamCaption}{ }\end{DoxyParamCaption})\hspace{0.3cm}{\ttfamily [inline]}}



Definition at line 50 of file combined\+\_\+normalization.\+hpp.



\subsection{Member Function Documentation}
\mbox{\label{classmlpack_1_1cf_1_1CombinedNormalization_a27ffe74669d0dfd1c217728c369b35f9}} 
\index{mlpack\+::cf\+::\+Combined\+Normalization@{mlpack\+::cf\+::\+Combined\+Normalization}!Denormalize@{Denormalize}}
\index{Denormalize@{Denormalize}!mlpack\+::cf\+::\+Combined\+Normalization@{mlpack\+::cf\+::\+Combined\+Normalization}}
\subsubsection{Denormalize()\hspace{0.1cm}{\footnotesize\ttfamily [1/2]}}
{\footnotesize\ttfamily double Denormalize (\begin{DoxyParamCaption}\item[{const size\+\_\+t}]{user,  }\item[{const size\+\_\+t}]{item,  }\item[{const double}]{rating }\end{DoxyParamCaption}) const\hspace{0.3cm}{\ttfamily [inline]}}



Denormalize rating by calling \doxyref{Denormalize()}{p.}{classmlpack_1_1cf_1_1CombinedNormalization_a27ffe74669d0dfd1c217728c369b35f9} in each normalization object. 

Note that the order of objects calling \doxyref{Denormalize()}{p.}{classmlpack_1_1cf_1_1CombinedNormalization_a27ffe74669d0dfd1c217728c369b35f9} should be the reversed order of objects calling \doxyref{Normalize()}{p.}{classmlpack_1_1cf_1_1CombinedNormalization_a47ac5da06a1301c0c72529184cc77a7e}.


\begin{DoxyParams}{Parameters}
{\em user} & User ID. \\
\hline
{\em item} & Item ID. \\
\hline
{\em rating} & Computed rating before denormalization. \\
\hline
\end{DoxyParams}


Definition at line 72 of file combined\+\_\+normalization.\+hpp.



Referenced by Combined\+Normalization$<$ Normalization\+Types $>$\+::serialize().

\mbox{\label{classmlpack_1_1cf_1_1CombinedNormalization_a93926452083f79197edc30f83476a40d}} 
\index{mlpack\+::cf\+::\+Combined\+Normalization@{mlpack\+::cf\+::\+Combined\+Normalization}!Denormalize@{Denormalize}}
\index{Denormalize@{Denormalize}!mlpack\+::cf\+::\+Combined\+Normalization@{mlpack\+::cf\+::\+Combined\+Normalization}}
\subsubsection{Denormalize()\hspace{0.1cm}{\footnotesize\ttfamily [2/2]}}
{\footnotesize\ttfamily void Denormalize (\begin{DoxyParamCaption}\item[{const arma\+::\+Mat$<$ size\+\_\+t $>$ \&}]{combinations,  }\item[{arma\+::vec \&}]{predictions }\end{DoxyParamCaption}) const\hspace{0.3cm}{\ttfamily [inline]}}



Denormalize rating by calling \doxyref{Denormalize()}{p.}{classmlpack_1_1cf_1_1CombinedNormalization_a27ffe74669d0dfd1c217728c369b35f9} in each normalization object. 

Note that the order of objects calling \doxyref{Denormalize()}{p.}{classmlpack_1_1cf_1_1CombinedNormalization_a27ffe74669d0dfd1c217728c369b35f9} should be the reversed order of objects calling \doxyref{Normalize()}{p.}{classmlpack_1_1cf_1_1CombinedNormalization_a47ac5da06a1301c0c72529184cc77a7e}.


\begin{DoxyParams}{Parameters}
{\em combinations} & User/\+Item combinations. \\
\hline
{\em predictions} & Predicted ratings for each user/item combination. \\
\hline
\end{DoxyParams}


Definition at line 87 of file combined\+\_\+normalization.\+hpp.

\mbox{\label{classmlpack_1_1cf_1_1CombinedNormalization_a58a35d3ef1c11ee69753aa099513840e}} 
\index{mlpack\+::cf\+::\+Combined\+Normalization@{mlpack\+::cf\+::\+Combined\+Normalization}!Normalizations@{Normalizations}}
\index{Normalizations@{Normalizations}!mlpack\+::cf\+::\+Combined\+Normalization@{mlpack\+::cf\+::\+Combined\+Normalization}}
\subsubsection{Normalizations()}
{\footnotesize\ttfamily const \textbf{ Tuple\+Type}\& Normalizations (\begin{DoxyParamCaption}{ }\end{DoxyParamCaption}) const\hspace{0.3cm}{\ttfamily [inline]}}



Return normalizations tuple. 



Definition at line 96 of file combined\+\_\+normalization.\+hpp.

\mbox{\label{classmlpack_1_1cf_1_1CombinedNormalization_a47ac5da06a1301c0c72529184cc77a7e}} 
\index{mlpack\+::cf\+::\+Combined\+Normalization@{mlpack\+::cf\+::\+Combined\+Normalization}!Normalize@{Normalize}}
\index{Normalize@{Normalize}!mlpack\+::cf\+::\+Combined\+Normalization@{mlpack\+::cf\+::\+Combined\+Normalization}}
\subsubsection{Normalize()}
{\footnotesize\ttfamily void Normalize (\begin{DoxyParamCaption}\item[{Mat\+Type \&}]{data }\end{DoxyParamCaption})\hspace{0.3cm}{\ttfamily [inline]}}



Normalize the data by calling \doxyref{Normalize()}{p.}{classmlpack_1_1cf_1_1CombinedNormalization_a47ac5da06a1301c0c72529184cc77a7e} in each normalization object. 


\begin{DoxyParams}{Parameters}
{\em data} & Input dataset. \\
\hline
\end{DoxyParams}


Definition at line 58 of file combined\+\_\+normalization.\+hpp.



Referenced by Combined\+Normalization$<$ Normalization\+Types $>$\+::serialize().

\mbox{\label{classmlpack_1_1cf_1_1CombinedNormalization_a68e832cb064e3b7ca978d8e5911cf700}} 
\index{mlpack\+::cf\+::\+Combined\+Normalization@{mlpack\+::cf\+::\+Combined\+Normalization}!serialize@{serialize}}
\index{serialize@{serialize}!mlpack\+::cf\+::\+Combined\+Normalization@{mlpack\+::cf\+::\+Combined\+Normalization}}
\subsubsection{serialize()}
{\footnotesize\ttfamily void serialize (\begin{DoxyParamCaption}\item[{Archive \&}]{ar,  }\item[{const unsigned int}]{version }\end{DoxyParamCaption})\hspace{0.3cm}{\ttfamily [inline]}}



Serialization. 



Definition at line 105 of file combined\+\_\+normalization.\+hpp.



References Combined\+Normalization$<$ Normalization\+Types $>$\+::\+Denormalize(), and Combined\+Normalization$<$ Normalization\+Types $>$\+::\+Normalize().



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/cf/normalization/\textbf{ combined\+\_\+normalization.\+hpp}\end{DoxyCompactItemize}