| 97 | } |
| 98 | |
| 99 | double VectorOps::GetSstddev(void) |
| 100 | { |
| 101 | double mean = GetMean(); |
| 102 | // get the variance |
| 103 | double totalVariance = 0.0; |
| 104 | vector<double>::const_iterator dIt = _vecd.begin(); |
| 105 | vector<double>::const_iterator dEnd = _vecd.end(); |
| 106 | for (; dIt != dEnd; ++dIt) { |
| 107 | totalVariance += pow((*dIt - mean),2); |
| 108 | } |
| 109 | double variance = totalVariance / (_vecd.size() - 1); |
| 110 | return sqrt(variance); |
| 111 | } |
| 112 | |
| 113 | double VectorOps::GetMedian(void) |
| 114 | { |