Changeset - r102:81563e019fa4
« 101:70f396
104:cdbba1 »
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deba@inf.elte.hu
deba@inf.elte.hu
Seeding random sequence
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2 files changed with 28 insertions and 0 deletions:
lemon/random.h
20
test/random_test.cc
8
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lemon/random.h
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... ... 
@@ -572,12 +572,32 @@
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      if (&other != this) {
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        core.copyState(other.core);
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      }
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      return *this;
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    }
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    /// \brief Seeding random sequence


			




	
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    ///


			




	
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    /// Seeding the random sequence. The current number type will be


			




	
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    /// converted to the architecture word type.


			




	
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    template <typename Number>


			




	
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    void seed(Number seed) { 


			




	
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      _random_bits::Initializer<Number, Word>::init(core, seed);


			




	
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    }


			




	
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    /// \brief Seeding random sequence


			




	
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    ///


			




	
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    /// Seeding the random sequence. The given range should contain


			




	
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    /// any number type and the numbers will be converted to the


			




	
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    /// architecture word type.


			




	
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    template <typename Iterator>


			




	
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    void seed(Iterator begin, Iterator end) { 


			




	
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      typedef typename std::iterator_traits<Iterator>::value_type Number;


			




	
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      _random_bits::Initializer<Number, Word>::init(core, begin, end);


			




	
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    }


			




	
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    /// \brief Returns a random real number from the range [0, 1)


			




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    ///


			




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    /// It returns a random real number from the range [0, 1). The


			




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    /// default Number type is \c double.


			




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    template <typename Number>


			




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    Number real() {

			




        

    

    

    

        

            

                

                    test/random_test.cc
                

                

                  
                  
                  
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///\file \brief Test cases for random.h


			




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///


			




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///\todo To be extended


			




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///


			




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int seed_array[] = {1, 2};


			




	
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int main()


			




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{


			




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  double a=lemon::rnd();


			




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  check(a<1.0&&a>0.0,"This should be in [0,1)");


			




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  a=lemon::rnd.gauss();


			




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  a=lemon::rnd.gamma(3.45,0);


			




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  a=lemon::rnd.gamma(4);


			




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  //Does gamma work with integer k?


			




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  a=lemon::rnd.gamma(4.0,0);


			




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  a=lemon::rnd.poisson(.5);


			




	
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  lemon::rnd.seed(100);


			




	
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  lemon::rnd.seed(seed_array, seed_array + 


			




	
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		  (sizeof(seed_array) / sizeof(seed_array[0])));


			




	
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  return 0;


			




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}


			




        

    






    
    



    


    

     
    
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