root/bdm/stat/loggers.h @ 263

/*!
  \file
  \brief Loggers for storing results of experiments
  \author Vaclav Smidl.

  -----------------------------------
  BDM++ - C++ library for Bayesian Decision Making under Uncertainty

  Using IT++ for numerical operations
  -----------------------------------
*/

#ifndef LGR_H
#define LGR_H

#include "libBM.h"

namespace bdm{
using std::string;

/*!
* \brief Logging into matrices in data format in memory

* More?...
*/

class memlog : public logger {

protected:
        //! Maximum length of vectors stored in memory
        int maxlen;
        //! Currect record to be written
        int ind;
        //! Storage
        Array<mat> vectors;
        //!
public:
        //!Default constructor
        memlog ( int maxlen0 ) : logger(),maxlen ( maxlen0 ),ind ( 0 ),vectors ( 0 ) {}
        //! Initialize storage
        void init() {
                int i; int n =entries.length();
                vectors.set_size ( n ); 
                for ( i=0;i<n;i++ ) {vectors(i).set_size (maxlen,entries(i).count() );}
                ;
        }
        void step() {if ( ind<maxlen ) ind++; else it_error ( "memlog::ind is too high;" );}
        void logit ( int id, const vec &v ) {
                it_assert_debug(id<vectors.length(),"Logger was not initialized, run init().");
                vectors ( id ).set_row ( ind,v );}
        //! Save values into an itfile named after \c fname.
        void itsave(const char* fname);
};

/*!
* \brief Logging into dirfile with buffer in memory

* Dirfile is a special format used by the kst program. See documentation of kst for description.
*
* This format is used to store scalars, hence multivariate RVs must be separated.
*/

class dirfilelog : public memlog {

protected:
        //!name of the directory
        string dirname;
        //! Automatically generated 
        Array<string> scalarnames;
public:
        /*!\brief Default constructor 
        @param dirname0 name of the directory in which to store the results
        @param maxlen0 length of the memory buffers, when full the buffers will be dumped to HDD and returned to the beginning. */
        dirfilelog ( std::string dirname0, int maxlen0 ) : memlog ( maxlen0 ), dirname ( dirname0 ), scalarnames ( 0 ) {}
        //! Initialize storage
        void init();
        void step();
        void finalize();
        /*! \brief Write memory storage to disk. 
        @param Len length of buffer to be written, if 0 the file is truncated at 0.
        */
        void write_buffers ( int Len );
};

};
#endif // LGR_H