Visual Basic (Declaration)  

Public Overloads Shared Function RFrequencyTableOL( _ ByVal seriesName As String, _ ByVal s As Series, _ ByVal boundaries() As Double _ ) As Series 
Visual Basic (Usage)  Copy Code 


C#  

public static Series RFrequencyTableOL( string seriesName, Series s, double[] boundaries ) 
Parameters
 seriesName
 The name of the series which will be displayed on the chart, i.e. its label.
 s
 A statistical series.
 boundaries
 A strictly increasing sequence of boundaries of the intervals over the real line in which the data sets point will be assigned.
Further Explanation
If we are comparing two or more data sets then the frequencies should be normalized to reflect the possible different sizes of the data sets themselves. To normalize a data set we much first divide the data set into a collection of classes into which the elements are assigned. Here we assign the data set in accordance with the open left boundary convention where the class frequencies are just the number of elements within each of the subintervals of the real line in accordance with the open left boundary convention (see example below).
To evaluate the relative frequency we apply the following formula to each
class:
Relative frequency = (class frequency) / (total frequency)
where the class frequency is the number of data points within a given subinterval
of the real line, and the total frequency is the total number of elements within
the data set considered.
Example Illustration the Open Left Boundary Convention
Consider the set of boundaries { b_1, b_2, b_3, b_4, b_5 }
, where
b_1 < b_2 < b_3 < b_4 < b_5
, which divide the real line into six
subintervals. Now if we use the open left boundary convention then the real line
will be divided into the subintervals:
(infinity, b_1], (b_1,b_2], (b_2,b_3], (b_3,b_4], (b_4,b_5], (5, infinity)
Note that, each point on the real line can be assigned to one of these subintervals
and therefore when assigning a data point to one of these intervals there will only
be one subinterval in which it belongs.