/// <summary>
/// perform data downsampling, it just aggregates data without applying lowpass filter
/// </summary>
/// <param name="data"></param>
/// <param name="period"></param>
/// <param name="operation"></param>
/// <returns>data after downsampling</returns>
public static double[] perform_downsampling(double[] data, int period, int operation)
{
if (period == 0)
{
throw new BrainFlowException((int)CustomExitCodes.INVALID_ARGUMENTS_ERROR);
}
if (data.Length / period <= 0)
{
throw new BrainFlowException((int)CustomExitCodes.INVALID_ARGUMENTS_ERROR);
}
double[] downsampled_data = new double[data.Length / period];
int res = DataHandlerLibrary.perform_downsampling(data, data.Length, period, operation, downsampled_data);
if (res != (int)CustomExitCodes.STATUS_OK)
{
throw new BrainFlowException(res);
}
return(downsampled_data);
}
