private static string TestIsMulticlassLabel(DataViewType type)
{
if (type.GetKeyCount() > 0 || type == NumberDataViewType.Single || type == NumberDataViewType.Double)
{
return(null);
}
return($"Label column type is not supported for binary remapping: {type}. Supported types: key, float, double.");
}
internal static bool IsValidColumnType(DataViewType type)
{
// REVIEW: Consider supporting all integer and unsigned types.
ulong keyCount = type.GetKeyCount();
return
((0 < keyCount && keyCount < Utils.ArrayMaxSize) || type is BooleanDataViewType ||
type == NumberDataViewType.Single || type == NumberDataViewType.Double || type == NumberDataViewType.Int32);
}
public static bool IsValidRangeFilterColumnType(IExceptionContext ectx, DataViewType type)
{
ectx.CheckValue(type, nameof(type));
return(type == NumberDataViewType.Single || type == NumberDataViewType.Double || type.GetKeyCount() > 0);
}
private RangeFilter(IHost host, ModelLoadContext ctx, IDataView input)
: base(host, input)
{
Host.CheckValue(ctx, nameof(ctx));
ctx.CheckAtModel(GetVersionInfo());
// *** Binary format ***
// int: sizeof(Float)
// int: id of column name
// double: min
// double: max
// byte: complement
int cbFloat = ctx.Reader.ReadInt32();
Host.CheckDecode(cbFloat == sizeof(float));
var column = ctx.LoadNonEmptyString();
var schema = Source.Schema;
if (!schema.TryGetColumnIndex(column, out _index))
{
throw Host.ExceptSchemaMismatch(nameof(schema), "source", column);
}
_type = schema[_index].Type;
if (_type != NumberDataViewType.Single && _type != NumberDataViewType.Double && _type.GetKeyCount() == 0)
{
throw Host.ExceptSchemaMismatch(nameof(schema), "source", column, "Single, Double or Key", _type.ToString());
}
_min = ctx.Reader.ReadDouble();
_max = ctx.Reader.ReadDouble();
if (!(_min <= _max))
{
throw Host.Except("min", "min must be less than or equal to max");
}
_complement = ctx.Reader.ReadBoolByte();
_includeMin = ctx.Reader.ReadBoolByte();
_includeMax = ctx.Reader.ReadBoolByte();
}
private void GetLabels(Transposer trans, DataViewType labelType, int labelCol)
{
int min;
int lim;
var labels = default(VBuffer <int>);
// Note: NAs have their own separate bin.
if (labelType == NumberDataViewType.Int32)
{
var tmp = default(VBuffer <int>);
trans.GetSingleSlotValue(labelCol, ref tmp);
BinInts(in tmp, ref labels, _numBins, out min, out lim);
_numLabels = lim - min;
}
else if (labelType == NumberDataViewType.Single)
{
var tmp = default(VBuffer <Single>);
trans.GetSingleSlotValue(labelCol, ref tmp);
BinSingles(in tmp, ref labels, _numBins, out min, out lim);
_numLabels = lim - min;
}
else if (labelType == NumberDataViewType.Double)
{
var tmp = default(VBuffer <Double>);
trans.GetSingleSlotValue(labelCol, ref tmp);
BinDoubles(in tmp, ref labels, _numBins, out min, out lim);
_numLabels = lim - min;
}
else if (labelType is BooleanDataViewType)
{
var tmp = default(VBuffer <bool>);
trans.GetSingleSlotValue(labelCol, ref tmp);
BinBools(in tmp, ref labels);
_numLabels = 3;
min = -1;
lim = 2;
}
else
{
ulong labelKeyCount = labelType.GetKeyCount();
Contracts.Assert(labelKeyCount < Utils.ArrayMaxSize);
KeyLabelGetter <int> del = GetKeyLabels <int>;
var methodInfo = del.GetMethodInfo().GetGenericMethodDefinition().MakeGenericMethod(labelType.RawType);
var parameters = new object[] { trans, labelCol, labelType };
_labels = (VBuffer <int>)methodInfo.Invoke(this, parameters);
_numLabels = labelType.GetKeyCountAsInt32(_host) + 1;
// No need to densify or shift in this case.
return;
}
// Densify and shift labels.
VBufferUtils.Densify(ref labels);
Contracts.Assert(labels.IsDense);
var labelsEditor = VBufferEditor.CreateFromBuffer(ref labels);
for (int i = 0; i < labels.Length; i++)
{
labelsEditor.Values[i] -= min;
Contracts.Assert(labelsEditor.Values[i] < _numLabels);
}
_labels = labelsEditor.Commit();
}