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# itpp_ext.h

    00001 //
    00002 // C++ Interface: itpp_ext
    00003 //
    00004 // Description:
    00005 //
    00006 //
    00007 // Author: smidl <smidl@utia.cas.cz>, (C) 2008
    00008 //
    00009 // Copyright: See COPYING file that comes with this distribution
    00010 //
    00011 //
    00012 #include <itpp/itbase.h>
    00013
    00014 #ifndef ITEX_H
    00015 #define ITEX_H
    00016
    00017 using std::cout;
    00018 using std::endl;
    00019
    00020 namespace itpp {
    00021         Array<int> to_Arr ( const ivec &indices );
    00022         ivec linspace ( int from, int to );
    00023
    00024         vec get_vec(const vec &v, const ivec &indexlist);
    00025
    00026         bvec operator& ( const bvec &a, const bvec &b );
    00027         bvec operator| ( const bvec &a, const bvec &b );
    00028
    00029 // template<class Num_T>
    00030 // void set_subvector(vec &ov, ivec &iv, const Vec<Num_T> &v);
    00031
    00032         void set_subvector ( vec &ov, const ivec &iv, const vec &v );
    00033
    00034         template<class Num_T> inline
    00035         void set_col_part(mat &M, int c, const Vec<Num_T> &v)
    00036         {
    00037                 copy_vector(v.size(), v._data(), M._data() + c*M.rows());
    00038         }
    00039
    00044         class Gamma_RNG {
    00045                 public:
    00047                         Gamma_RNG ( double a=1.0, double b=1.0 );
    00049                         void setup ( double a0, double b0 ) { alpha=a0; beta=b0;}
    00051                         double get_setup() const;
    00053                         double operator() () { return sample(); }
    00055                         vec operator() ( int n );
    00057                         mat operator() ( int h, int w );
    00058                 protected:
    00059                 private:
    00061                         double sample();
    00063                         double alpha;
    00065                         double beta;
    00067                         Random_Generator RNG;
    00068                         Normal_RNG NRNG;
    00070                         inline double exp_rand() {return -std::log ( RNG.random_01() );}
    00071                         inline double unif_rand() {return RNG.random_01();}
    00072                         inline double norm_rand() {return NRNG.sample();}
    00073
    00074         };
    00075         bool qr ( const mat &A, mat &R );
    00076
    00078         std::string num2str(double d);
    00079
    00081         std::string num2str(int i);
    00082
    00084         double psi(double);
    00085 }
    00086
    00087
    00088 #endif //ITEX_H