public ActionResult <KMeansResponse> Post([FromForm(Name = "file")] IFormFile file, [FromQuery] int numberOfClusters = 3)
{
var lines = _getScvRows.GetLines(file);
var points = lines.Transform();
var result = new KMeansResponse();
var centroid = new Centroids();
List <List <double> > clusterCenters = AlgorithmsUtils.MakeInitialSeeds(points, numberOfClusters);
bool stop = false;
Dictionary <List <double>, List <double> > clusters = null;
while (!stop)
{
_logger.LogInformation($"Iteration = {iteration}");
iteration++;
clusters = KMeansAlgorithm.MakeClusters(points, clusterCenters);
List <List <double> > oldClusterCenters = clusterCenters;
//recalculete center of clusters
clusterCenters = KMeansAlgorithm.RecalculateCoordinateOfClusterCenters(clusters, clusterCenters);
if (ListUtils.IsListEqualsToAnother(clusterCenters, oldClusterCenters))
{
int counter = 1;
stop = true;
result.Centroids = new Centroids();
var list = new List <PointsAndClusterNumber>();
foreach (var center in clusterCenters)
{
var map = clusters.Where(point => ListUtils.IsListEqualsToAnother(point.Value, center));
foreach (var item in map)
{
var pointAndCluster = new PointsAndClusterNumber()
{
Point = new List <double>()
};
pointAndCluster.Point = item.Key;
pointAndCluster.ClusterNumber = counter;
list.Add(pointAndCluster);
}
counter++;
}
result.PointsAndClusterNumber = list;
result.Centroids.Centroid = clusterCenters;
}
}
return(Ok(result));
}
