The static Ranks() method on class StatsFunctions returns the rank of each element in a data set an as array of integers. For example:
int[] ranks = StatsFunctions.Ranks( data );
By default, the ranks are calculated using ascending order. Alternatively, you can specify a sort order using a value from the SortingType enumeration. Thus:
int[] ranks = StatsFunctions.Ranks( data, SortingType.Descending );
NOTE- StatsSettings.Sorting specifies the default SortingType.
The Rank() method returns where a given value would rank within a data set, if it were part of the data set. Again, the sorting order can be specified using a value from the SortingType enumeration. For instance:
double x = 5.342; int rank = StatsFunctions.Rank( data, x, SortingType.Descending );
Percentile() calculates the value at the nth percentile of the elements in a data set, where 
. For example, to find the value at the 95th percentile:
double x = StatsFunctions.Percentile( data, 0.95 );
PercentileRank() performs the inverse calculation, returning the percentile a given value would have if it were part of the data set:
double x = 23.653; double percentile = StatsFunctions.Percentile( data, x );
The returned percentile value is between 0 and 1.
Similarly, Decile() calculates a given decile, specified as an integer between 0 and 10, of the elements in a data set. Quartile() calculates a given quartile, specified as an integer between 0 and 4. For example, this code finds the third quartile value:
double x = StatsFunctions.Quartile( data, 3 );TOC | Previous | Next | Index