///<summary>
/// Sttrips a surface: expiry by strike, from a flattened cube, excluding the strike headers.
///</summary>
///<param name="inputRange">The input data range.</param>
///<param name="tenorFilter">The tenor string to filter on.</param>
///<param name="numTenors">The number of tenors.</param>
///<param name="strikeArray">The strike array.</param>
///<returns></returns>
public double[,] FilterSurface(Excel.Range inputRange, String tenorFilter, int numTenors, Excel.Range strikeArray)
{
var values = inputRange.get_Value(System.Reflection.Missing.Value) as object[, ];
var strike = DataRangeHelper.StripDoubleRange(strikeArray);
return(DataRangeHelper.FilterSurface(values, tenorFilter, numTenors, strike.ToArray()));
}