computing the sum within a loop

Hi, a section of my code is as follows:

insert

Code:

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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]);
           
                 
                 
                 
       
        }

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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

Quote:

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Originally Posted by zesty

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?

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