private protected virtual IEnumerable <KeyValuePair <RoleMappedSchema.ColumnRole, string> > GetInputColumnRolesCore(RoleMappedSchema schema)
{
// Get the score column information.
var scoreCol = EvaluateUtils.GetScoreColumn(Host, schema.Schema, ScoreCol, nameof(ArgumentsBase.ScoreColumn),
ScoreColumnKind);
yield return(RoleMappedSchema.CreatePair(MetadataUtils.Const.ScoreValueKind.Score, scoreCol.Name));
// Get the label column information.
string label = EvaluateUtils.GetColName(LabelCol, schema.Label, DefaultColumnNames.Label);
yield return(RoleMappedSchema.ColumnRole.Label.Bind(label));
string weight = EvaluateUtils.GetColName(WeightCol, schema.Weight, null);
if (!string.IsNullOrEmpty(weight))
{
yield return(RoleMappedSchema.ColumnRole.Weight.Bind(weight));
}
}
/// <summary>
/// Evaluates scored clustering data.
/// </summary>
/// <param name="data">The scored data.</param>
/// <param name="score">The name of the score column in <paramref name="data"/>.</param>
/// <param name="label">The name of the optional label column in <paramref name="data"/>.</param>
/// <param name="features">The name of the optional feature column in <paramref name="data"/>.</param>
/// <returns>The evaluation results.</returns>
public ClusteringMetrics Evaluate(IDataView data, string score, string label = null, string features = null)
{
Host.CheckValue(data, nameof(data));
Host.CheckNonEmpty(score, nameof(score));
var roles = new List <KeyValuePair <RoleMappedSchema.ColumnRole, string> >();
roles.Add(RoleMappedSchema.CreatePair(MetadataUtils.Const.ScoreValueKind.Score, score));
if (label != null)
{
roles.Add(RoleMappedSchema.ColumnRole.Label.Bind(label));
}
if (features != null)
{
roles.Add(RoleMappedSchema.ColumnRole.Feature.Bind(features));
}
var rolesMappedData = new RoleMappedData(data, opt: false, roles.ToArray());
var resultDict = ((IEvaluator)this).Evaluate(rolesMappedData);
Host.Assert(resultDict.ContainsKey(MetricKinds.OverallMetrics));
var overall = resultDict[MetricKinds.OverallMetrics];
ClusteringMetrics result;
using (var cursor = overall.GetRowCursorForAllColumns())
{
var moved = cursor.MoveNext();
Host.Assert(moved);
result = new ClusteringMetrics(Host, cursor, _calculateDbi);
moved = cursor.MoveNext();
Host.Assert(!moved);
}
return(result);
}
