1 | // |
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2 | // C++ Interface: itpp_ext |
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3 | // |
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4 | // Description: |
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5 | // |
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6 | // |
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7 | // Author: smidl <smidl@utia.cas.cz>, (C) 2008 |
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8 | // |
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9 | // Copyright: See COPYING file that comes with this distribution |
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10 | // |
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11 | // |
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12 | #include <itpp/itbase.h> |
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13 | |
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14 | #ifndef ITEX_H |
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15 | #define ITEX_H |
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16 | |
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17 | using std::cout; |
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18 | using std::endl; |
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19 | |
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20 | namespace itpp { |
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21 | Array<int> to_Arr ( const ivec &indices ); |
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22 | ivec linspace ( int from, int to ); |
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23 | |
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24 | vec get_vec(const vec &v, const ivec &indexlist); |
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25 | |
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26 | bvec operator& ( const bvec &a, const bvec &b ); |
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27 | bvec operator| ( const bvec &a, const bvec &b ); |
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28 | |
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29 | // template<class Num_T> |
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30 | // void set_subvector(vec &ov, ivec &iv, const Vec<Num_T> &v); |
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31 | |
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32 | void set_subvector ( vec &ov, const ivec &iv, const vec &v ); |
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33 | |
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34 | template<class Num_T> inline |
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35 | void set_col_part(mat &M, int c, const Vec<Num_T> &v) |
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36 | { |
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37 | copy_vector(v.size(), v._data(), M._data() + c*M.rows()); |
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38 | } |
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39 | |
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40 | #ifdef TTT |
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41 | /*! |
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42 | \brief Gamma distribution |
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43 | \ingroup randgen |
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44 | */ |
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45 | class Gamma_RNG { |
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46 | public: |
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47 | //! constructor. Set lambda. |
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48 | Gamma_RNG ( double a=1.0, double b=1.0 ); |
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49 | //! Set lambda |
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50 | void setup ( double a0, double b0 ) { alpha=a0; beta=b0;} |
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51 | //! get lambda |
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52 | double get_setup() const; |
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53 | //! Get one sample. |
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54 | double operator() () { return sample(); } |
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55 | //! Get a sample vector. |
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56 | vec operator() ( int n ); |
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57 | //! Get a sample matrix. |
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58 | mat operator() ( int h, int w ); |
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59 | protected: |
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60 | private: |
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61 | //! |
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62 | double sample(); |
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63 | //! |
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64 | double alpha; |
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65 | //! |
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66 | double beta; |
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67 | //! |
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68 | Random_Generator RNG; |
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69 | Normal_RNG NRNG; |
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70 | //! compatibility with R |
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71 | inline double exp_rand() {return -std::log ( RNG.random_01() );} |
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72 | inline double unif_rand() {return RNG.random_01();} |
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73 | inline double norm_rand() {return NRNG.sample();} |
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74 | |
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75 | }; |
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76 | #endif |
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77 | bool qr ( const mat &A, mat &R ); |
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78 | |
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79 | //! reimplementation of matlab num2str |
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80 | std::string num2str(double d); |
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81 | |
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82 | //! reimplementation of matlabs num2str |
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83 | std::string num2str(int i); |
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84 | } |
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85 | |
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86 | |
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87 | #endif //ITEX_H |
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