double SRGraph::GetIndexTotal(int index, int nMinGroup, int nMaxGroup)
Interrogates and sums the data values for a particular index across all groups -- can throw an SRGraphException if the index value is too large
Defined in: SRGraph.cpp
Return Value
Total of all values from the requested index taken from all groups
Parameters
index
Zero-based column index to interogate or -2 for the first column or -1 for the last
nMinGroup
Lowest group in the range
nMaxGroup
Highest group in the range