/// <summary>
/// Estimates the sample mean.
/// Returns NaN if data is empty or if any entry is NaN.
/// </summary>
/// <param name="data">The data to calculate the mean of.</param>
/// <returns>The mean of the sample.</returns>
public static double Mean(this IEnumerable <double> data)
{
var array = data as double[];
return(array != null
? ArrayStatistics.Mean(array)
: StreamingStatistics.Mean(data));
}
/// <summary>
/// Estimates the sample mean.
/// Returns NaN if data is empty or if any entry is NaN.
/// Null-entries are ignored.
/// </summary>
/// <param name="data">The data to calculate the mean of.</param>
/// <returns>The mean of the sample.</returns>
public static double Mean(this IEnumerable <double?> data)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
return(StreamingStatistics.Mean(data.Where(d => d.HasValue).Select(d => d.Value)));
}
/// <summary>
/// Estimates the sample mean.
/// Returns NaN if data is empty or if any entry is NaN.
/// Null-entries are ignored.
/// </summary>
/// <param name="data">The data to calculate the mean of.</param>
/// <returns>The mean of the sample.</returns>
public static double Mean(this IEnumerable <double?> data)
{
return(StreamingStatistics.Mean(data.Where(d => d.HasValue).Select(d => d.Value)));
}
