public override IEnumerable <SuggestedTransform> Apply(IntermediateColumn[] columns, TaskKind task)
{
if (task != TaskKind.Recommendation)
{
yield break;
}
foreach (var column in columns)
{
if (column.Purpose == ColumnPurpose.UserId ||
column.Purpose == ColumnPurpose.ItemId)
{
yield return(ValueToKeyMappingExtension.CreateSuggestedTransform(Context, column.ColumnName, column.ColumnName));
}
}
}
public override IEnumerable <SuggestedTransform> Apply(IntermediateColumn[] columns, TaskKind task)
{
if (task != TaskKind.MulticlassClassification)
{
yield break;
}
var lastLabelColId = Array.FindLastIndex(columns, x => x.Purpose == ColumnPurpose.Label);
if (lastLabelColId < 0)
{
yield break;
}
var col = columns[lastLabelColId];
if (!col.Type.IsKey())
{
yield return(ValueToKeyMappingExtension.CreateSuggestedTransform(Context, col.ColumnName, col.ColumnName));
}
}
