Public Overloads Sub GroupByAxisLabel( _
   ByVal formula As String, _
   ByVal inputSeriesName As String, _
   ByVal outputSeriesName As String _
) 

Visual Basic (Usage)	Copy Code
Dim instance As DataManipulator Dim formula As String Dim inputSeriesName As String Dim outputSeriesName As String   instance.GroupByAxisLabel(formula, inputSeriesName, outputSeriesName)

public void GroupByAxisLabel( 
   string formula,
   string inputSeriesName,
   string outputSeriesName
)

Parameters

formula

The formula(s) to be used for calculating the "grouped" data point values. Multiple formulas can be specified by using comma-separated values.
Grouping formula.

inputSeriesName

The name(s) of series  that will be grouped.
Comma separated input data series names.

outputSeriesName

The name(s) of the series that will store the grouped data points. If a series does not exist it will be created; if it does exist it will first be cleared of all data before storing grouped points. Must be the same number of series as inputSeriesName or an exception will be thrown .
Comma separated output data series names.

Data points that have the exact same X-axis label (determined by the AxisLabel property) are grouped together into one data point. This new data point has Y-value(s) that are determined by the applied formula(s). Note that axis label comparisons are case sensitive.

The grouped data points are also sorted. For example, grouped data points with a "John" label will be displayed before grouped data points with a "Mark" label.

The first specified formula is the default, and is applied to all Y-values that are not calculated using subsequent formulas. Formulas specified after the default formula must have a "value" prefix to identify which value they should be applied to. For example, an expression of "SUM, Y2:AVE" means that an average of secondary Y-values will be calculated, and a sum of all other Y-values will be calculated. See Table1  for a listing of possible formulas and their descriptions.

Formulas are not applied to X-values, only to Y-values.

If a specified output series has not been created and added to the SeriesCollection when this function call is made it will be created and added to the collection automatically, and have default series properties (e.g. column chart type, etc.). In addition, the ChartArea property of the series is set to "Default", and if a chart area with the name "Default" exists in the ChartAreasCollection it will be used to draw the chart. If there is no chart area with this name the first ChartArea object in the collection will be used to display the series.

All data points in the given series are grouped (i.e. it is not possible to group only some of a series' data points).

Empty data points will be ignored or treated as zeros, depending on the IgnoreEmptyPoints property (by default IgnoreEmptyPoints is True).

        Table 1 - Formulas.

Target Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family

Reference