computing the sum within a loop

[zesty]

Hi, a section of my code is as follows:

insert

for (i = 0; i < N; i++){
		

		
		result[0] = distance(myPoints[i], myPoints[(i+1)%N]);
		
		printf("first distance:%f\n", result[0]);
		
		for (j = 0; j < N; j++){
		
		
		
			if (i == j)
			 	continue;
				
				
				
				dis[i] = distance(myPoints[i], myPoints[j]);
            printf("%d %d\n", i, j);
			printf("%f\n", dis[i]);
				
     		if (result[0] > dis[i])
	 
	       result[0] = dis[i];
		 
			
      }    
	if(result[0] != 0) {entropyxy[i] += (log(2*result[0]));
	}
		   
		   printf("shortest: %f\n", result[0]);
	    
		   
		   
		   
	
	}

my formula for entropy is : entropyxy = SUM(from i=1 to N) log(2*result(i))

However, my entropyxy doesn't seem to increment as it stands in my code. It only computes log(2*result[0]) but doesn't add this onto the previous value of the entropyxy i.e. entropyxy[i-1]. any help on how to solve this?

N.B result[0] changes for each value of i. (it is the shortest distance to a point)


thanks

[MK27]

my entropyxy doesn't seem to increment as it stands in my code. It only computes log(2*result[0]) but doesn't add this onto the previous value of the entropyxy i.e. entropyxy[i-1]. any help on how to solve this?

Your code does not say add to entropyxy[i-1], it says add to entropyxy[i].