[394] | 1 | #include "emix.h" |
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[107] | 2 | |
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[477] | 3 | namespace bdm { |
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[107] | 4 | |
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[1064] | 5 | void emix_base::validate () { |
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| 6 | epdf::validate(); |
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| 7 | bdm_assert ( no_coms() > 0, "There has to be at least one component." ); |
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[477] | 8 | |
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[1064] | 9 | bdm_assert ( no_coms() == w.length(), "It is obligatory to define weights of all the components." ); |
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[750] | 10 | |
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[1064] | 11 | double sum_w = sum ( w ); |
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| 12 | bdm_assert ( sum_w != 0, "There has to be a component with non-zero weight." ); |
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| 13 | w = w / sum_w; |
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[766] | 14 | |
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[1064] | 15 | dim = component ( 0 )->dimension(); |
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| 16 | RV rv_tmp = component ( 0 )->_rv() ; |
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| 17 | bool isnamed = component( 0 )->isnamed(); |
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| 18 | for ( int i = 1; i < no_coms(); i++ ) { |
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| 19 | bdm_assert ( dim == ( component ( i )->dimension() ), "Component sizes do not match!" ); |
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| 20 | isnamed &= component(i)->isnamed() & component(i)->_rv().equal(rv_tmp); |
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| 21 | } |
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| 22 | if (isnamed) |
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| 23 | epdf::set_rv ( rv_tmp); |
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[107] | 24 | } |
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| 25 | |
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[750] | 26 | |
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| 27 | |
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[886] | 28 | vec emix_base::sample() const { |
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[1064] | 29 | //Sample which component |
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| 30 | vec cumDist = cumsum ( w ); |
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| 31 | double u0; |
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[477] | 32 | #pragma omp critical |
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[1064] | 33 | u0 = UniRNG.sample(); |
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[107] | 34 | |
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[1064] | 35 | int i = 0; |
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| 36 | while ( ( cumDist ( i ) < u0 ) && ( i < ( w.length() - 1 ) ) ) { |
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| 37 | i++; |
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| 38 | } |
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[124] | 39 | |
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[1064] | 40 | return component ( i )->sample(); |
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[107] | 41 | } |
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[165] | 42 | |
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[886] | 43 | vec emix_base::mean() const { |
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[1064] | 44 | int i; |
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| 45 | vec mu = zeros ( dim ); |
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| 46 | for ( i = 0; i < w.length(); i++ ) { |
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| 47 | mu += w ( i ) * component ( i )->mean(); |
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| 48 | } |
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| 49 | return mu; |
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[739] | 50 | } |
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| 51 | |
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[886] | 52 | vec emix_base::variance() const { |
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[1064] | 53 | //non-central moment |
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| 54 | vec mom2 = zeros ( dim ); |
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| 55 | vec mom1 = zeros ( dim ); |
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| 56 | |
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| 57 | for ( int i = 0; i < w.length(); i++ ) { |
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| 58 | vec vi=component( i )->variance(); |
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| 59 | vec mi=component ( i )->mean(); |
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| 60 | mom2 += w ( i ) * ( vi + pow ( mi, 2 ) ); |
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| 61 | mom1 += w(i) * mi; |
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| 62 | } |
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| 63 | //central moment |
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| 64 | return mom2 - pow ( mom1, 2 ); |
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[739] | 65 | } |
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| 66 | |
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[886] | 67 | double emix_base::evallog ( const vec &val ) const { |
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[1064] | 68 | int i; |
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| 69 | double sum = 0.0; |
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| 70 | for ( i = 0; i < w.length(); i++ ) { |
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| 71 | sum += w ( i ) * exp ( component ( i )->evallog ( val ) ); |
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| 72 | } |
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| 73 | if ( sum == 0.0 ) { |
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| 74 | sum = std::numeric_limits<double>::epsilon(); |
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| 75 | } |
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| 76 | double tmp = log ( sum ); |
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| 77 | bdm_assert_debug ( std::isfinite ( tmp ), "Infinite" ); |
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| 78 | return tmp; |
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[739] | 79 | } |
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| 80 | |
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[886] | 81 | vec emix_base::evallog_mat ( const mat &Val ) const { |
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[1064] | 82 | vec x = zeros ( Val.cols() ); |
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| 83 | for ( int i = 0; i < w.length(); i++ ) { |
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| 84 | x += w ( i ) * exp ( component( i )->evallog_mat ( Val ) ); |
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| 85 | } |
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| 86 | return log ( x ); |
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[739] | 87 | }; |
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| 88 | |
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[886] | 89 | mat emix_base::evallog_coms ( const mat &Val ) const { |
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[1064] | 90 | mat X ( w.length(), Val.cols() ); |
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| 91 | for ( int i = 0; i < w.length(); i++ ) { |
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| 92 | X.set_row ( i, w ( i ) *exp ( component( i )->evallog_mat ( Val ) ) ); |
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| 93 | } |
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| 94 | return X; |
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[739] | 95 | } |
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| 96 | |
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[886] | 97 | shared_ptr<epdf> emix_base::marginal ( const RV &rv ) const { |
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[1064] | 98 | emix *tmp = new emix(); |
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| 99 | shared_ptr<epdf> narrow ( tmp ); |
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| 100 | marginal ( rv, *tmp ); |
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| 101 | return narrow; |
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[504] | 102 | } |
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| 103 | |
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[886] | 104 | void emix_base::marginal ( const RV &rv, emix &target ) const { |
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[1064] | 105 | bdm_assert ( isnamed(), "rvs are not assigned" ); |
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[477] | 106 | |
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[1064] | 107 | Array<shared_ptr<epdf> > Cn ( no_coms() ); |
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| 108 | for ( int i = 0; i < no_coms(); i++ ) { |
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| 109 | Cn ( i ) = component ( i )->marginal ( rv ); |
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| 110 | } |
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[504] | 111 | |
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[1064] | 112 | target._w() = w; |
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| 113 | target._Coms() = Cn; |
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| 114 | target.validate(); |
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[182] | 115 | } |
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| 116 | |
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[886] | 117 | shared_ptr<pdf> emix_base::condition ( const RV &rv ) const { |
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[1064] | 118 | bdm_assert ( isnamed(), "rvs are not assigned" ); |
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| 119 | mratio *tmp = new mratio ( this, rv ); |
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| 120 | return shared_ptr<pdf> ( tmp ); |
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[504] | 121 | } |
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[182] | 122 | |
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[886] | 123 | void emix::from_setting ( const Setting &set ) { |
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[1064] | 124 | emix_base::from_setting(set); |
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| 125 | UI::get ( Coms, set, "pdfs", UI::compulsory ); |
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| 126 | UI::get ( w, set, "weights", UI::compulsory ); |
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[254] | 127 | } |
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[956] | 128 | void emix::to_setting (Setting &set) const { |
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[1064] | 129 | emix_base::to_setting(set); |
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| 130 | UI::save(Coms, set, "pdfs"); |
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| 131 | UI::save( w, set, "weights"); |
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[956] | 132 | } |
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[333] | 133 | |
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[956] | 134 | |
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[1068] | 135 | void emix::validate () { |
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[1064] | 136 | emix_base::validate(); |
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| 137 | dim = Coms ( 0 )->dimension(); |
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[878] | 138 | } |
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| 139 | |
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[333] | 140 | |
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[739] | 141 | double mprod::evallogcond ( const vec &val, const vec &cond ) { |
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[1064] | 142 | int i; |
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| 143 | double res = 0.0; |
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| 144 | for ( i = pdfs.length() - 1; i >= 0; i-- ) { |
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[1068] | 145 | /* if ( pdfs(i)->_rvc().count() >0) { |
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| 146 | pdfs ( i )->condition ( dls ( i )->get_cond ( val,cond ) ); |
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| 147 | } |
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| 148 | // add logarithms |
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| 149 | res += epdfs ( i )->evallog ( dls ( i )->pushdown ( val ) );*/ |
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[1064] | 150 | res += pdfs ( i )->evallogcond ( |
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| 151 | dls ( i )->pushdown ( val ), |
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| 152 | dls ( i )->get_cond ( val, cond ) |
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| 153 | ); |
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| 154 | } |
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| 155 | return res; |
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[739] | 156 | } |
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| 157 | |
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| 158 | vec mprod::evallogcond_mat ( const mat &Dt, const vec &cond ) { |
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[1064] | 159 | vec tmp ( Dt.cols() ); |
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| 160 | for ( int i = 0; i < Dt.cols(); i++ ) { |
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| 161 | tmp ( i ) = evallogcond ( Dt.get_col ( i ), cond ); |
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| 162 | } |
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| 163 | return tmp; |
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[739] | 164 | } |
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| 165 | |
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| 166 | vec mprod::evallogcond_mat ( const Array<vec> &Dt, const vec &cond ) { |
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[1064] | 167 | vec tmp ( Dt.length() ); |
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| 168 | for ( int i = 0; i < Dt.length(); i++ ) { |
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| 169 | tmp ( i ) = evallogcond ( Dt ( i ), cond ); |
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| 170 | } |
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| 171 | return tmp; |
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[739] | 172 | } |
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| 173 | |
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[737] | 174 | void mprod::set_elements ( const Array<shared_ptr<pdf> > &mFacs ) { |
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[1064] | 175 | pdfs = mFacs; |
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| 176 | dls.set_size ( mFacs.length() ); |
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[507] | 177 | |
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[1064] | 178 | rv = get_composite_rv ( pdfs, true ); |
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| 179 | dim = rv._dsize(); |
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[507] | 180 | |
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[1064] | 181 | for ( int i = 0; i < pdfs.length(); i++ ) { |
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| 182 | RV rvx = pdfs ( i )->_rvc().subt ( rv ); |
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| 183 | rvc.add ( rvx ); // add rv to common rvc |
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| 184 | } |
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| 185 | dimc = rvc._dsize(); |
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[507] | 186 | |
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[1064] | 187 | // rv and rvc established = > we can link them with pdfs |
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| 188 | for ( int i = 0; i < pdfs.length(); i++ ) { |
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| 189 | dls ( i ) = new datalink_m2m; |
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| 190 | dls ( i )->set_connection ( pdfs ( i )->_rv(), pdfs ( i )->_rvc(), _rv(), _rvc() ); |
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| 191 | } |
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[507] | 192 | } |
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| 193 | |
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[956] | 194 | void mprod::from_setting ( const Setting &set ) { |
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[1064] | 195 | pdf::from_setting(set); |
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| 196 | Array<shared_ptr<pdf> > temp_array; |
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| 197 | UI::get ( temp_array, set, "pdfs", UI::compulsory ); |
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| 198 | set_elements ( temp_array ); |
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| 199 | } |
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[1068] | 200 | void mprod::to_setting (Setting &set) const { |
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[1064] | 201 | pdf::to_setting(set); |
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| 202 | UI::save( pdfs, set, "pdfs"); |
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| 203 | } |
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[956] | 204 | |
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[766] | 205 | void mmix::validate() |
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[1064] | 206 | { pdf::validate(); |
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| 207 | bdm_assert ( Coms.length() > 0, "There has to be at least one component." ); |
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[766] | 208 | |
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[1064] | 209 | bdm_assert ( Coms.length() == w.length(), "It is obligatory to define weights of all the components." ); |
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[766] | 210 | |
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[1064] | 211 | double sum_w = sum ( w ); |
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| 212 | bdm_assert ( sum_w != 0, "There has to be a component with non-zero weight." ); |
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| 213 | w = w / sum_w; |
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[766] | 214 | |
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[783] | 215 | |
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[1064] | 216 | dim = Coms ( 0 )->dimension(); |
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| 217 | dimc = Coms ( 0 )->dimensionc(); |
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| 218 | RV rv_tmp = Coms ( 0 )->_rv(); |
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| 219 | RV rvc_tmp = Coms ( 0 )->_rvc(); |
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| 220 | bool isnamed = Coms ( 0 )->isnamed(); |
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| 221 | for ( int i = 1; i < Coms.length(); i++ ) { |
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| 222 | bdm_assert ( dim == ( Coms ( i )->dimension() ), "Component sizes do not match!" ); |
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| 223 | bdm_assert ( dimc >= ( Coms ( i )->dimensionc() ), "Component sizes do not match!" ); |
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| 224 | isnamed &= Coms(i)->isnamed() & Coms(i)->_rv().equal(rv_tmp) & Coms(i)->_rvc().equal(rvc_tmp); |
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| 225 | } |
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| 226 | if (isnamed) |
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| 227 | { |
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| 228 | pdf::set_rv ( rv_tmp ); |
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| 229 | pdf::set_rvc ( rvc_tmp ); |
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| 230 | } |
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[766] | 231 | } |
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| 232 | |
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| 233 | void mmix::from_setting ( const Setting &set ) { |
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| 234 | |
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[1064] | 235 | pdf::from_setting(set); |
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| 236 | UI::get ( Coms, set, "pdfs", UI::compulsory ); |
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| 237 | |
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| 238 | if ( !UI::get ( w, set, "weights", UI::optional ) ) { |
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| 239 | int len = Coms.length(); |
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| 240 | w.set_length ( len ); |
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| 241 | w = 1.0 / len; |
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| 242 | } |
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[766] | 243 | } |
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| 244 | |
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[1068] | 245 | void mmix::to_setting (Setting &set) const { |
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[1064] | 246 | pdf::to_setting(set); |
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| 247 | UI::save( Coms, set, "pdfs"); |
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| 248 | UI::save( w, set, "weights"); |
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[956] | 249 | } |
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| 250 | |
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[737] | 251 | vec mmix::samplecond ( const vec &cond ) { |
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[1064] | 252 | //Sample which component |
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| 253 | vec cumDist = cumsum ( w ); |
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| 254 | double u0; |
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[488] | 255 | #pragma omp critical |
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[1064] | 256 | u0 = UniRNG.sample(); |
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[488] | 257 | |
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[1064] | 258 | int i = 0; |
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| 259 | while ( ( cumDist ( i ) < u0 ) && ( i < ( w.length() - 1 ) ) ) { |
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| 260 | i++; |
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| 261 | } |
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[488] | 262 | |
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[1064] | 263 | return Coms ( i )->samplecond ( cond ); |
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[333] | 264 | } |
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[488] | 265 | |
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[886] | 266 | vec eprod_base::mean() const { |
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[1064] | 267 | vec tmp ( dim ); |
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| 268 | for ( int i = 0; i < no_factors(); i++ ) { |
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| 269 | vec pom = factor( i )->mean(); |
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| 270 | dls ( i )->pushup ( tmp, pom ); |
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| 271 | } |
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| 272 | return tmp; |
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[488] | 273 | } |
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[739] | 274 | |
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[886] | 275 | vec eprod_base::variance() const { |
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[1064] | 276 | vec tmp ( dim ); //second moment |
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| 277 | for ( int i = 0; i < no_factors(); i++ ) { |
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| 278 | vec pom = factor ( i )->variance(); |
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| 279 | dls ( i )->pushup ( tmp, pom ); // |
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| 280 | } |
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| 281 | return tmp; |
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[739] | 282 | } |
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[886] | 283 | vec eprod_base::sample() const { |
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[1064] | 284 | vec tmp ( dim ); |
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| 285 | for ( int i = 0; i < no_factors(); i++ ) { |
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| 286 | vec pom = factor ( i )->sample(); |
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| 287 | dls ( i )->pushup ( tmp, pom ); |
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| 288 | } |
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| 289 | return tmp; |
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[739] | 290 | } |
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[886] | 291 | double eprod_base::evallog ( const vec &val ) const { |
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[1064] | 292 | double tmp = 0; |
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| 293 | for ( int i = 0; i < no_factors(); i++ ) { |
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| 294 | tmp += factor ( i )->evallog ( dls ( i )->pushdown ( val ) ); |
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| 295 | } |
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| 296 | //bdm_assert_debug ( std::isfinite ( tmp ), "Infinite" ); |
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| 297 | return tmp; |
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[739] | 298 | } |
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| 299 | |
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| 300 | } |
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