/// <summary>
/// Returns the measured value regarding the given characteristic averaged across all datapoints corresponding to this service unit and the current group indicated by the supplied filter function.
/// </summary>
/// <param name="entry">The characteristic to look up.</param>
/// <param name="datapointFilter">A function filtering for the datapoints of the current group.</param>
/// <returns>The value measured for the characteristic (average across corresponding datapoints).</returns>
public double GetValue(FootprintDatapoint.FootPrintEntry entry, Func <FootprintDatapoint, bool> datapointFilter)
{
return(_datapoints.Where(d => datapointFilter(d)).Average(d => Convert.ToDouble(d[entry])));
}
/// <summary>
/// Returns the measured value regarding the given characteristic averaged across all datapoints corresponding to this service unit.
/// </summary>
/// <param name="entry">The characteristic to look up.</param>
/// <returns>The value measured for the characteristic (average across corresponding datapoints).</returns>
public double this[FootprintDatapoint.FootPrintEntry entry] {
get { return(_datapoints.Average(d => (double)d[entry])); }
}
