1 | /*! |
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2 | \file |
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3 | \brief Common DataSources. |
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4 | \author Vaclav Smidl. |
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5 | |
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6 | ----------------------------------- |
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7 | BDM++ - C++ library for Bayesian Decision Making under Uncertainty |
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8 | |
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9 | Using IT++ for numerical operations |
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10 | ----------------------------------- |
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11 | */ |
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12 | |
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13 | #ifndef DS_H |
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14 | #define DS_H |
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15 | |
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16 | |
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17 | #include "libBM.h" |
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18 | #include "libEF.h" |
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19 | |
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20 | |
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21 | namespace bdm { |
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22 | /*! |
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23 | * \brief Memory storage of off-line data column-wise |
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24 | |
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25 | The data are stored in an internal matrix \c Data . Each column of Data corresponds to one discrete time observation \f$t\f$. Access to this matrix is via indices \c rowid and \c delays. |
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26 | |
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27 | The data can be loaded from a file. |
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28 | */ |
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29 | class MemDS : public DS { |
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30 | protected: |
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31 | //! internal matrix of data |
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32 | mat Data; |
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33 | //! active column in the Data matrix |
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34 | int time; |
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35 | //! vector of rows that are presented in Dt |
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36 | ivec rowid; |
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37 | //! vector of delays that are presented in Dt |
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38 | ivec delays; |
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39 | |
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40 | public: |
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41 | void getdata ( vec &dt ); |
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42 | void getdata ( vec &dt, const ivec &indeces ); |
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43 | void set_rvs ( RV &drv, RV &urv ); |
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44 | void write ( vec &ut ) {it_error ( "MemDS::write is not supported" );} |
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45 | void write ( vec &ut,ivec &indices ) {it_error ( "MemDS::write is not supported" );} |
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46 | void step(); |
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47 | //!Default constructor |
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48 | MemDS () {}; |
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49 | MemDS ( mat &Dat, ivec &rowid, ivec &delays ); |
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50 | }; |
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51 | |
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52 | /*! Read Data Matrix from an IT file |
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53 | |
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54 | */ |
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55 | class FileDS: public MemDS { |
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56 | |
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57 | public: |
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58 | FileDS ( const string &fname, const string &varname ) :MemDS() { |
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59 | it_file it ( fname ); |
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60 | it << Name ( varname ); |
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61 | it >> Data; |
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62 | time =0; |
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63 | //rowid and delays are ignored |
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64 | } |
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65 | void getdata ( vec &dt ) { |
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66 | it_assert_debug ( dt.length() ==Data.rows(),"" ); |
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67 | dt = Data.get_col(time); |
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68 | }; |
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69 | void getdata ( vec &dt, const ivec &indeces ){ |
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70 | it_assert_debug ( dt.length() ==indeces.length(),"" ); |
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71 | vec tmp(indeces.length()); |
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72 | tmp = Data.get_col(time); |
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73 | dt = tmp(indeces); |
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74 | }; |
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75 | //! returns number of data in the file; |
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76 | int ndat(){return Data.cols();} |
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77 | }; |
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78 | |
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79 | /*! |
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80 | \brief Generator of ARX data |
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81 | |
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82 | */ |
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83 | class ArxDS : public DS { |
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84 | protected: |
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85 | //! Rv of the regressor |
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86 | RV Rrv; |
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87 | //! History, ordered as \f$[y_t, u_t, y_{t-1 }, u_{t-1}, \ldots]\f$ |
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88 | vec H; |
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89 | //! (future) input |
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90 | vec U; |
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91 | //! temporary variable for regressor |
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92 | vec rgr; |
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93 | //! data link: H -> rgr |
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94 | datalink rgrlnk; |
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95 | //! model of Y - linear Gaussian |
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96 | mlnorm<chmat> model; |
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97 | //! options |
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98 | bool opt_L_theta; |
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99 | //! loggers |
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100 | int L_theta; |
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101 | int L_R; |
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102 | int dt_size; |
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103 | public: |
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104 | void getdata ( vec &dt ) { |
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105 | //it_assert_debug ( dt.length() ==Drv.count(),"ArxDS" ); |
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106 | dt=H; |
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107 | }; |
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108 | void getdata ( vec &dt, const ivec &indices ) { |
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109 | it_assert_debug ( dt.length() ==indices.length(),"ArxDS" ); |
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110 | dt=H ( indices ); |
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111 | }; |
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112 | void write ( vec &ut ) { |
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113 | //it_assert_debug ( ut.length() ==Urv.count(),"ArxDS" ); |
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114 | U=ut; |
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115 | }; |
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116 | void write ( vec &ut, const ivec &indices ) { |
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117 | it_assert_debug ( ut.length() ==indices.length(),"ArxDS" ); |
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118 | set_subvector ( U, indices,ut ); |
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119 | }; |
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120 | void step(); |
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121 | //!Default constructor |
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122 | ArxDS ( ) {}; |
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123 | //! Set parameters of the internal model, H is maximum time delay |
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124 | void set_parameters ( const mat &Th0, const vec mu0, const chmat &sqR0 ) |
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125 | { model.set_parameters ( Th0, mu0, sqR0 );}; |
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126 | //! Set |
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127 | void set_drv ( RV &yrv, RV &urv, RV &rrv ) { |
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128 | Rrv = rrv; |
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129 | Urv = urv; |
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130 | dt_size = yrv._dsize() +urv._dsize(); |
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131 | |
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132 | RV drv = concat ( yrv,urv ); |
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133 | Drv = drv; |
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134 | int td = rrv.mint(); |
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135 | H.set_size ( drv._dsize() * ( -td+1 ) ); |
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136 | U.set_size ( Urv._dsize() ); |
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137 | for ( int i=-1;i>=td;i-- ) { |
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138 | drv.t ( -1 ); |
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139 | Drv.add ( drv ); //shift u1 |
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140 | } |
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141 | rgrlnk.set_connection ( rrv,Drv ); |
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142 | |
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143 | dtsize = Drv._dsize(); |
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144 | utsize = Urv._dsize(); |
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145 | } |
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146 | //! set options from a string |
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147 | void set_options ( const string &s ) { |
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148 | opt_L_theta= ( s.find ( "L_theta" ) !=string::npos ); |
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149 | }; |
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150 | virtual void log_add ( logger &L ) { |
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151 | //DS::log_add ( L ); too long!! |
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152 | L_dt=L.add ( Drv ( 0,dt_size ),"" ); |
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153 | L_ut=L.add ( Urv,"" ); |
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154 | |
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155 | mat &A =model._A(); |
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156 | mat R =model._R(); |
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157 | if ( opt_L_theta ) {L_theta=L.add ( RV ( "{th }", vec_1 ( A.rows() *A.cols() ) ),"t" );} |
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158 | if ( opt_L_theta ) {L_R=L.add ( RV ( "{R }", vec_1 ( R.rows() *R.cols() ) ),"r" );} |
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159 | } |
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160 | virtual void logit ( logger &L ) { |
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161 | //DS::logit ( L ); |
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162 | L.logit ( L_dt, H.left ( dt_size ) ); |
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163 | L.logit ( L_ut, U ); |
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164 | |
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165 | mat &A =model._A(); |
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166 | mat R =model._R(); |
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167 | if ( opt_L_theta ) {L.logit ( L_theta,vec ( A._data(), A.rows() *A.cols() ) );}; |
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168 | if ( opt_L_theta ) {L.logit ( L_R, vec ( R._data(), R.rows() *R.rows() ) );}; |
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169 | } |
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170 | |
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171 | }; |
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172 | |
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173 | class stateDS : public DS { |
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174 | protected: |
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175 | //!conditional pdf of the state evolution \f$ f(x_t|x_{t-1}) \f$ |
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176 | mpdf* IM; |
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177 | //!conditional pdf of the observations \f$ f(d_t|x_t) \f$ |
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178 | mpdf* OM; |
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179 | //! result storage |
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180 | vec dt; |
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181 | //! state storage |
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182 | vec xt; |
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183 | //! input storage |
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184 | vec ut; |
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185 | //! Logger |
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186 | int L_xt; |
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187 | public: |
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188 | void getdata ( vec &dt0 ) {dt0=dt;} |
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189 | void getdata ( vec &dt0, const ivec &indeces ) {dt0=dt ( indeces );} |
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190 | |
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191 | stateDS ( mpdf* IM0, mpdf* OM0, int usize ) :DS ( ),IM ( IM0 ),OM ( OM0 ), |
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192 | dt ( OM0->dimension() ), xt ( IM0->dimension() ), ut ( usize ) {} |
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193 | ~stateDS() {delete IM; delete OM;} |
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194 | virtual void step() { |
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195 | xt=IM->samplecond ( concat ( xt,ut ) ); |
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196 | dt=OM->samplecond ( concat ( xt,ut ) ); |
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197 | }; |
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198 | |
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199 | virtual void log_add ( logger &L ) { |
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200 | DS::log_add ( L ); |
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201 | L_xt=L.add ( IM->_rv(),"true" ); |
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202 | } |
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203 | virtual void logit ( logger &L ) { |
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204 | DS::logit ( L ); |
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205 | L.logit ( L_xt,xt ); |
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206 | } |
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207 | |
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208 | }; |
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209 | |
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210 | }; //namespace |
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211 | |
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212 | #endif // DS_H |
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