public DataView(IHostEnvironment env, ArrayDataViewBuilder builder, int rowCount)
{
Contracts.AssertValue(env, "env");
_host = env.Register("ArrayDataView");
_host.AssertValue(builder);
_host.Assert(rowCount >= 0);
_host.Assert(builder._names.Count == builder._columns.Count);
_columns = builder._columns.ToArray();
var schemaCols = new Schema.Column[_columns.Length];
for (int i = 0; i < schemaCols.Length; i++)
{
var meta = new Schema.Metadata.Builder();
if (builder._getSlotNames.TryGetValue(builder._names[i], out var slotNamesGetter))
{
meta.AddSlotNames(_columns[i].Type.VectorSize, slotNamesGetter);
}
if (builder._getKeyValues.TryGetValue(builder._names[i], out var keyValueGetter))
{
meta.AddKeyValues(_columns[i].Type.KeyCount, TextType.Instance, keyValueGetter);
}
schemaCols[i] = new Schema.Column(builder._names[i], _columns[i].Type, meta.GetMetadata());
}
_schema = new Schema(schemaCols);
_rowCount = rowCount;
}
public Schema.Column[] GetOutputColumns()
{
var meta = new Schema.Metadata.Builder();
meta.AddSlotNames(_parent._outputLength, GetSlotNames);
var info = new Schema.Column[1];
info[0] = new Schema.Column(_parent.OutputColumnName, new VectorType(NumberType.R8, _parent._outputLength), meta.GetMetadata());
return(info);
}
public override Schema.Column[] GetOutputColumns()
{
var infos = new Schema.Column[2];
var slotNamesType = new VectorType(TextType.Instance, _scoreSize);
var l1Metadata = new Schema.Metadata.Builder();
l1Metadata.AddSlotNames(_scoreSize, CreateSlotNamesGetter(L1));
var l2Metadata = new Schema.Metadata.Builder();
l2Metadata.AddSlotNames(_scoreSize, CreateSlotNamesGetter(L2));
infos[L1Col] = new Schema.Column(L1, _outputType, l1Metadata.GetMetadata());
infos[L2Col] = new Schema.Column(L2, _outputType, l2Metadata.GetMetadata());
return(infos);
}
public override Schema.Column[] GetOutputColumns()
{
var infos = new Schema.Column[3];
infos[ClusterIdCol] = new Schema.Column(ClusterId, _types[ClusterIdCol], null);
var slotNamesType = new VectorType(TextType.Instance, _numClusters);
var sortedClusters = new Schema.Metadata.Builder();
sortedClusters.AddSlotNames(slotNamesType.VectorSize, CreateSlotNamesGetter(_numClusters, "Cluster"));
var sortedClusterScores = new Schema.Metadata.Builder();
sortedClusterScores.AddSlotNames(slotNamesType.VectorSize, CreateSlotNamesGetter(_numClusters, "Score"));
infos[SortedClusterCol] = new Schema.Column(SortedClusters, _types[SortedClusterCol], sortedClusters.GetMetadata());
infos[SortedClusterScoreCol] = new Schema.Column(SortedClusterScores, _types[SortedClusterScoreCol], sortedClusterScores.GetMetadata());
return(infos);
}
private void CheckInputColumnTypes(Schema schema, out ColumnType labelType, out ColumnType scoreType,
out Schema.Metadata labelMetadata, out Schema.Metadata scoreMetadata)
{
Host.AssertNonEmpty(ScoreCol);
Host.AssertNonEmpty(LabelCol);
var t = schema.GetColumnType(LabelIndex);
if (!t.IsKnownSizeVector || (t.ItemType != NumberType.R4 && t.ItemType != NumberType.R8))
{
throw Host.Except("Label column '{0}' has type '{1}' but must be a known-size vector of R4 or R8", LabelCol, t);
}
labelType = new VectorType(t.ItemType.AsPrimitive, t.VectorSize);
var slotNamesType = new VectorType(TextType.Instance, t.VectorSize);
var builder = new Schema.Metadata.Builder();
builder.AddSlotNames(t.VectorSize, CreateSlotNamesGetter(schema, LabelIndex, labelType.VectorSize, "True"));
labelMetadata = builder.GetMetadata();
t = schema.GetColumnType(ScoreIndex);
if (t.VectorSize == 0 || t.ItemType != NumberType.Float)
{
throw Host.Except("Score column '{0}' has type '{1}' but must be a known length vector of type R4", ScoreCol, t);
}
scoreType = new VectorType(t.ItemType.AsPrimitive, t.VectorSize);
builder = new Schema.Metadata.Builder();
builder.AddSlotNames(t.VectorSize, CreateSlotNamesGetter(schema, ScoreIndex, scoreType.VectorSize, "Predicted"));
ValueGetter <ReadOnlyMemory <char> > getter = GetScoreColumnKind;
builder.Add(new Schema.Column(MetadataUtils.Kinds.ScoreColumnKind, TextType.Instance, null), getter);
getter = GetScoreValueKind;
builder.Add(new Schema.Column(MetadataUtils.Kinds.ScoreValueKind, TextType.Instance, null), getter);
ValueGetter <uint> uintGetter = GetScoreColumnSetId(schema);
builder.Add(new Schema.Column(MetadataUtils.Kinds.ScoreColumnSetId, MetadataUtils.ScoreColumnSetIdType, null), uintGetter);
scoreMetadata = builder.GetMetadata();
}