| 1 | #include "emix.h" |
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| 2 | |
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| 3 | using namespace itpp; |
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| 4 | |
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| 5 | void emix::set_parameters ( const vec &w0, const Array<epdf*> &Coms0 ) { |
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| 6 | w = w0; |
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| 7 | int i; |
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| 8 | for ( i=0;i<w.length();i++ ) { |
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| 9 | it_assert_debug ( rv.equal ( Coms0 ( i )->_rv() ),"RVs do not match!" ); |
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| 10 | } |
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| 11 | Coms = Coms0; |
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| 12 | } |
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| 13 | |
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| 14 | vec emix::sample() const { |
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| 15 | //Sample which component |
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| 16 | vec cumDist = cumsum ( w ); |
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| 17 | double u0 = UniRNG.sample(); |
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| 18 | |
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| 19 | int i=0; |
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| 20 | while ( ( cumDist ( i ) <u0 ) && ( i< ( w.length()-1 ) ) ) {i++;} |
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| 21 | |
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| 22 | return Coms ( i )->sample(); |
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| 23 | } |
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| 24 | |
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| 25 | mprod::mprod ( Array<mpdf*> mFacs, bool overlap) : mpdf ( RV(), RV() ), n ( mFacs.length() ), epdfs ( n ), mpdfs ( mFacs ), rvinds ( n ), rvcinrv ( n ), rvcinds ( n ) { |
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| 26 | int i; |
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| 27 | bool rvaddok; |
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| 28 | // Create rv |
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| 29 | for ( i = 0;i < n;i++ ) { |
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| 30 | rvaddok=rv.add ( mpdfs ( i )->_rv() ); //add rv to common rvs. |
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| 31 | // If rvaddok==false, mpdfs overlap => assert error. |
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| 32 | it_assert_debug(rvaddok||overlap,"mprod::mprod() input mpdfs overlap in rv!"); |
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| 33 | epdfs ( i ) = & ( mpdfs ( i )->_epdf() ); // add pointer to epdf |
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| 34 | }; |
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| 35 | // Create rvc |
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| 36 | for ( i = 0;i < n;i++ ) { |
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| 37 | rvc.add ( mpdfs ( i )->_rvc().subt ( rv ) ); //add rv to common rvs. |
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| 38 | }; |
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| 39 | |
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| 40 | independent = true; |
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| 41 | //test rvc of mpdfs and fill rvinds |
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| 42 | for ( i = 0;i < n;i++ ) { |
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| 43 | // find ith rv in common rv |
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| 44 | rvinds ( i ) = mpdfs ( i )->_rv().dataind ( rv ); |
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| 45 | // find ith rvc in common rv |
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| 46 | rvcinrv ( i ) = mpdfs ( i )->_rvc().dataind ( rv ); |
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| 47 | // find ith rvc in common rv |
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| 48 | rvcinds ( i ) = mpdfs ( i )->_rvc().dataind ( rvc ); |
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| 49 | // |
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| 50 | if ( rvcinds ( i ).length() >0 ) {independent = false;} |
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| 51 | if ( rvcinds ( i ).length() >0 ) {independent = false;} |
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| 52 | } |
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| 53 | }; |
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