OOPSE/libmdtools/Utility.cpp

#include "Utility.hpp"
#include <vector>
#include <iostream>
#include <math.h>
using namespace std;

double dotProduct(vector<double>& v1, vector<double>& v2){
  double sum;

  sum = 0;

  if(v1.size() != v2.size()){
    cerr << "Utility Error: dimension of two vectors are not matched" << endl;
    exit(-1);
  }
  
   for(int  i = 0; i < v1.size(); i++)
     sum += v1[i]*v2[i];
   return sum;
}

double copysign(double sign, double value){
  double result = fabs(value);

  return sign >= 0 ? result : -result;
}
Revision:	1039
Committed:	Sat Feb 7 00:16:47 2004 UTC (20 years, 5 months ago) by tim
File size:	542 byte(s)
Log Message:	* empty log message *
#	User	Rev	Content
1	tim	1039	#include "Utility.hpp"
2			#include <vector>
3			#include <iostream>
4			#include <math.h>
5			using namespace std;
6
7			double dotProduct(vector<double>& v1, vector<double>& v2){
8			double sum;
9
10			sum = 0;
11
12			if(v1.size() != v2.size()){
13			cerr << "Utility Error: dimension of two vectors are not matched" << endl;
14			exit(-1);
15			}
16
17			for(int i = 0; i < v1.size(); i++)
18			sum += v1[i]*v2[i];
19			return sum;
20			}
21
22			double copysign(double sign, double value){
23			double result = fabs(value);
24
25			return sign >= 0 ? result : -result;
26			}