/// <summary>
/// Gets the column frequencies. Here, the column frequency of zero is located in the center of the matrix.
/// </summary>
/// <param name="numberOfResultColumnFrequencies">The number of resulting column frequencies. Use the value <see cref="NumberOfColumns"/> to get all frequencies, or a value less than that to get only a part of the frequencies.</param>
/// <returns>Vector that accomodates the column frequencies.</returns>
/// <exception cref="System.ArgumentOutOfRangeException">NumberOfResultRows has to be less than or equal to the existing number of rows.</exception>
public IROVector <double> GetColumnFrequenciesCentered(int numberOfResultColumnFrequencies)
{
if (numberOfResultColumnFrequencies > NumberOfColumns)
{
throw new ArgumentOutOfRangeException(string.Format("numberOfResultRows has to be less than or equal to the existing number of rows"));
}
int colsNegative = (NumberOfColumns - 1) / 2;
double stepFrequency = 0.5 / (NumberOfColumns * (_columnSpacing.HasValue ? _columnSpacing.Value : 1));
int columnOffset = (NumberOfColumns - numberOfResultColumnFrequencies) / 2;
return(VectorMath.CreateEquidistantSequencyByStartAtOffsetStepLength(0, colsNegative - columnOffset, stepFrequency, numberOfResultColumnFrequencies));
}