/// <summary>
/// Normalizes cluster's datapoints using the specified normalize method.
/// </summary>
/// <param name="normalizeMethod">The normalize method.</param>
public void Normalize(NormalizeMethod normalizeMethod)
{
// if there is no normalization
if (normalizeMethod == NormalizeMethod.None)
{
return;
}
int pointCount = ClustersList[0].DataPoints[0].Count; // datapoints count
int clustersCount = ClustersList.Count; // clusters count
// gets all data subgrouped by their datapoints
double[][] dataArray = new double[pointCount][];
for (int i = 0; i < pointCount; i++)
{
dataArray[i] = new double[clustersCount];
for (int j = 0; j < clustersCount; j++)
{
dataArray[i][j] = ClustersList[j].DataPoints[0][i];
}
}
// normalizes data
if (normalizeMethod == NormalizeMethod.MinMax)
{
for (int i = 0; i < pointCount; i++)
{
Tools.MinMaxNormalize(ref dataArray[i]);
}
}
else if (normalizeMethod == NormalizeMethod.ZScore)
{
for (int i = 0; i < pointCount; i++)
{
Tools.ZScoreNormalize(ref dataArray[i]);
}
}
// updates data with normalized one
for (int i = 0; i < pointCount; i++)
{
for (int j = 0; j < ClustersList.Count; j++)
{
ClustersList[j].DataPoints[0][i] = dataArray[i][j];
}
}
}
/// <summary>
/// Handles the Click event of the calculateClusterCountButton control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
/// <exception cref="Clusterizer.CustomException">Не было выбрано ни одного показателя. - Ощибка при выборе показателей</exception>
private void calculateClusterCountButton_Click(object sender, EventArgs e)
{
// gets selected parameters of clustering
distanceMetric = (DistanceMetric)distanceSelectComboBox.SelectedIndex;
strategy = (MergeStrategy)strategySelectComboBox.SelectedIndex;
normalizeMethod = (NormalizeMethod)normalizeMethodSelectComboBox.SelectedIndex;
// gets selected datapoints
var isChosen = new bool[Tools.NumericDataHeadings.Length];
bool isAllFalse = true;
int ind = 0;
for (int i = 0; i < pointsSelectTreeView.Nodes.Count; i++)
{
for (int j = 0; j < pointsSelectTreeView.Nodes[i].Nodes.Count; j++)
{
isChosen[ind] = pointsSelectTreeView.Nodes[i].Nodes[j].Checked;
if (isAllFalse)
{
isAllFalse = !isChosen[ind];
}
ind++;
}
}
// check if no datapoint is selected
if (isAllFalse)
{
throw new CustomException("Не было выбрано ни одного показателя.", "Ощибка при выборе показателей");
}
// gets cluster set from data
var clusters = Tools.Data.GetClusterSet(Tools.isChosen);
clusters.Normalize(normalizeMethod);
// executes clustering for determining recomended count of clusters
Agnes agnes = new Agnes(clusters,
distanceMetric, strategy);
agnes.ExecuteClustering(2, true);
// gets recomended count of clusters
countOfClusters = agnes.GetRecommendedCountOfClusters();
clusterCountTextBox.Text = $"{countOfClusters}";
}
/// <summary>
/// Handles the Click event of the doClusteringButton control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
/// <exception cref="Clusterizer.CustomException">
/// Введите правилное количество кластеров. - Ошибка при вводе числа кластеров
/// or
/// Не было выбрано не одного показателя. - Ощибка при выборе показателей
/// </exception>
private void doClusteringButton_Click(object sender, EventArgs e)
{
// Gets selected parameters of clustering
distanceMetric = (DistanceMetric)distanceSelectComboBox.SelectedIndex;
strategy = (MergeStrategy)strategySelectComboBox.SelectedIndex;
normalizeMethod = (NormalizeMethod)normalizeMethodSelectComboBox.SelectedIndex;
// checks for correct cluster number
if (int.TryParse(clusterCountTextBox.Text, out var tmp) && tmp > 0 && tmp < Tools.Data.Rows.Count)
{
countOfClusters = tmp;
}
else
{
throw new CustomException("Введите правилное количество кластеров.", "Ошибка при вводе числа кластеров");
}
// gets selected datapoints
var isChosen = new bool[Tools.NumericDataHeadings.Length];
bool isAllFalse = true;
int ind = 0;
for (int i = 0; i < pointsSelectTreeView.Nodes.Count; i++)
{
for (int j = 0; j < pointsSelectTreeView.Nodes[i].Nodes.Count; j++)
{
isChosen[ind] = pointsSelectTreeView.Nodes[i].Nodes[j].Checked;
if (isAllFalse)
{
isAllFalse = !isChosen[ind];
}
ind++;
}
}
// check if no datapoint is selected
if (isAllFalse)
{
throw new CustomException("Не было выбрано не одного показателя.", "Ощибка при выборе показателей");
}
Tools.isChosen = isChosen;
isParametersSelected = true;
Close();
}
/// <inheritdoc cref ="INormalizeAggregation.Method"/> public NormalizeAggregationDescriptor Method(NormalizeMethod method) => Assign(method, (a, v) => a.Method = v);
