ddot_.cpp

最大熵 等模型使用的 lbfgs 训练源代码。

#include <iostream>
#include <stdlib.h>
#include "lbfgs.h"
/* ddot function realizes inner production of two input vectors x and y.
   Concretely speacking, it computes five relative weights at one time.
*/
void main()
{
	float x[10]={1,2,3,4,5,6,7,8,9,10};
	float y[10]={-1,-2,-3,-4,-5,-6,-7,-8,-9,-10};
	std::cout<<"vector starts at first position and shifts with 1 step length"<<std::endl;
	std::cout<<scitbx::lbfgs::detail::ddot<float,int>(10,x,y)<<std::endl;
	std::cout<<1*1+2*2+3*3+4*4+5*5+6*6+7*7+8*8+9*9+10*10<<std::endl;
	std::cout<<"vector starts at first position and shifts with 2 step length"<<std::endl;
	std::cout<<scitbx::lbfgs::detail::ddot<float,int>(5,x,0,2,y,0,2)<<std::endl;
	std::cout<<1*1+3*3+5*5+7*7+9*9<<std::endl;
	std::cout<<"vector starts at third position and shifts with 1 step length"<<std::endl;
	std::cout<<scitbx::lbfgs::detail::ddot<float,int>(7,x,3,1,y,3,1)<<std::endl;
	std::cout<<4*4+5*5+6*6+7*7+8*8+9*9+10*10<<std::endl;
}