public Factory(RoleMappedData data, CursOpt opt = CursOpt.Features)
: base(data, opt)
{
}
protected override FeatureFloatVectorCursor CreateCursorCore(IRowCursor input, RoleMappedData data, CursOpt opt, Action <CursOpt> signal)
{
return(new FeatureFloatVectorCursor(input, data, opt, signal));
}
protected override StandardScalarCursor CreateCursorCore(IRowCursor input, RoleMappedData data, CursOpt opt, Action <CursOpt> signal) => new StandardScalarCursor(input, data, opt, signal);
public FeatureFloatVectorCursor(RoleMappedData data, CursOpt opt = CursOpt.Features,
IRandom rand = null, params int[] extraCols)
: this(CreateCursor(data, opt, rand, extraCols), data, opt)
{
}
public StandardScalarCursor(RoleMappedData data, CursOpt opt, IRandom rand = null, params int[] extraCols)
: this(CreateCursor(data, opt, rand, extraCols), data, opt)
{
}
public Factory(RoleMappedData data, CursOpt opt)
: base(data, opt)
{
}
private void SignalCore(CursOpt opt)
{
lock (_lock)
_opts |= opt;
}
public MultiClassLabelCursor(int classCount, RoleMappedData data, CursOpt opt = CursOpt.Label,
IRandom rand = null, params int[] extraCols)
: this(classCount, CreateCursor(data, opt, rand, extraCols), data, opt)
{
}
/// <summary>
/// Create a row cursor set for the RoleMappedData with the indicated standard columns active.
/// This does not verify that the columns exist, but merely activates the ones that do exist.
/// </summary>
public static IRowCursor[] CreateRowCursorSet(this RoleMappedData data, out IRowCursorConsolidator consolidator,
CursOpt opt, int n, IRandom rand, IEnumerable <int> extraCols = null)
=> data.Data.GetRowCursorSet(out consolidator, CreatePredicate(data, opt, extraCols), n, rand);
protected static IRowCursor CreateCursor(RoleMappedData data, CursOpt opt, IRandom rand, params int[] extraCols)
{
Contracts.AssertValue(data);
Contracts.AssertValueOrNull(rand);
return(data.CreateRowCursor(opt, rand, extraCols));
}
/// <summary> /// Create a row cursor for the RoleMappedData with the indicated standard columns active. /// This does not verify that the columns exist, but merely activates the ones that do exist. /// </summary> public static IRowCursor CreateRowCursor(this RoleMappedData data, CursOpt opt, IRandom rand, IEnumerable <int> extraCols = null) => data.Data.GetRowCursor(CreatePredicate(data, opt, extraCols), rand);
protected override MultiClassLabelCursor CreateCursorCore(IRowCursor input, RoleMappedData data, CursOpt opt, Action <CursOpt> signal)
{
return(new MultiClassLabelCursor(_classCount, input, data, opt, signal));
}
protected MultiClassLabelCursor(int classCount, IRowCursor input, RoleMappedData data, CursOpt opt, Action <CursOpt> signal = null)
: base(input, data, opt, signal)
{
Contracts.Assert(classCount >= 0);
_classCount = classCount;
if ((opt & CursOpt.Label) != 0 && data.Schema.Label != null)
{
_get = Row.GetLabelFloatGetter(data);
_keepBad = (opt & CursOpt.AllowBadLabels) != 0;
}
}
public FloatLabelCursor(RoleMappedData data, CursOpt opt = CursOpt.Label,
IRandom rand = null, params int[] extraCols)
: this(CreateCursor(data, opt, rand, extraCols), data, opt)
{
}
/// <summary> /// Called by both the <see cref="Create"/> and <see cref="CreateSet"/> factory methods. Implementors /// should instantiate the particular wrapping cursor. /// </summary> /// <param name="input">The row cursor we will wrap.</param> /// <param name="data">The data from which the row cursor was instantiated.</param> /// <param name="opt">The cursor options this row cursor was created with.</param> /// <param name="signal">The action that our wrapping cursor will call. Implementors of the cursor /// do not usually call it directly, but instead override /// <see cref="TrainingCursorBase.CursoringCompleteFlags"/>, whose return value is used to call /// this action.</param> /// <returns></returns> protected abstract TCurs CreateCursorCore(IRowCursor input, RoleMappedData data, CursOpt opt, Action <CursOpt> signal);
private static IEnumerable <Schema.Column> CreatePredicate(RoleMappedData data, CursOpt opt, IEnumerable <int> extraCols)
{
Contracts.AssertValue(data);
Contracts.AssertValueOrNull(extraCols);
var columns = extraCols == null?
Enumerable.Empty <Schema.Column>() :
data.Data.Schema.Where(c => extraCols.Contains(c.Index));
if ((opt & CursOpt.Label) != 0 && data.Schema.Label.HasValue)
{
columns = columns.Append(data.Schema.Label.Value);
}
if ((opt & CursOpt.Features) != 0 && data.Schema.Feature.HasValue)
{
columns = columns.Append(data.Schema.Feature.Value);
}
if ((opt & CursOpt.Weight) != 0 && data.Schema.Weight.HasValue)
{
columns = columns.Append(data.Schema.Weight.Value);
}
if ((opt & CursOpt.Group) != 0 && data.Schema.Group.HasValue)
{
columns = columns.Append(data.Schema.Group.Value);
}
return(columns);
}
/// <summary>
/// Create a row cursor set for the <see cref="RoleMappedData"/> with the indicated standard columns active.
/// This does not verify that the columns exist, but merely activates the ones that do exist.
/// </summary>
public static RowCursor[] CreateRowCursorSet(this RoleMappedData data,
CursOpt opt, int n, Random rand, IEnumerable <int> extraCols = null)
=> data.Data.GetRowCursorSet(CreatePredicate(data, opt, extraCols), n, rand);