/// <summary>
/// Finds the specified number of neighbours to the specified data point
/// </summary>
/// <returns>Indecies for nearest</returns>
public static int[] NearestNeighbours(this INormalizedData normalizedData, double[] point, int limit)
{
var normalizedPoint = normalizedData.Normalize(point);
var nearestList = normalizedData
.Data
.Select((col, i) => new
{
i,
Distance = Distance.EuclideanDistance(col, normalizedPoint)
})
.OrderBy(x => x.Distance)
.Take(limit)
.Select(x => x.i)
.ToArray();
return(nearestList);
}
/// <summary>
/// Normalizes a row of data given an existing min/max value
/// </summary>
/// <returns>Returns the normalized matrix</returns>
public static double[] Normalize(this INormalizedData data, double[] row)
{
return(NormalizeTuple(data.MinMaxValues, row));
}
