/* Requires: Analyzed mean & stddev
*/
inline extended_sample_data_t::value_t covariance( const extended_sample_data_t& x, const extended_sample_data_t& y )
{
if ( x.simple || y.simple )
return 0;
return statistics::calculate_correlation_coefficient( x.data().begin(), x.data().end(), x.mean(), x.std_dev, y.data().begin(), y.data().end(), y.mean(), y.std_dev );
}
/* Create Histogram from extended sample data, using min/max from sd data
*/
void create_histogram( const extended_sample_data_t& sd, size_t num_buckets )
{
if ( sd.simple || sd.data().empty() )
return;
double min = *std::min_element( sd.data().begin(), sd.data().end() );
double max = *std::max_element( sd.data().begin(), sd.data().end() );
create_histogram( sd, num_buckets, min, max );
}
/* Create Histogram from extended sample data, with given min/max
*/
void create_histogram( const extended_sample_data_t& sd, size_t num_buckets, double min, double max )
{
if ( sd.simple || sd.data().empty() )
return;
clear();
_min = min; _max = max;
_data = statistics::create_histogram( sd.data().begin(), sd.data().end(), num_buckets, _min, _max );
calculate_num_entries();
}