private VBuffer <int> GetKeyLabels <T>(Transposer trans, int labelCol, DataViewType labelColumnType)
{
var tmp = default(VBuffer <T>);
var labels = default(VBuffer <int>);
trans.GetSingleSlotValue(labelCol, ref tmp);
BinKeys <T>(labelColumnType)(in tmp, ref labels);
VBufferUtils.Densify(ref labels);
return(labels);
}
private int[] GetKeyLabels <T>(Transposer trans, int labelCol, ColumnType labeColumnType)
{
var tmp = default(VBuffer <T>);
var labels = default(VBuffer <int>);
trans.GetSingleSlotValue(labelCol, ref tmp);
BinKeys <T>(labeColumnType)(ref tmp, ref labels);
VBufferUtils.Densify(ref labels);
var values = labels.Values;
if (labels.Length < values.Length)
{
Array.Resize(ref values, labels.Length);
}
return(values);
}
private void GetLabels(Transposer trans, ColumnType labelType, int labelCol)
{
int min;
int lim;
var labels = default(VBuffer <int>);
// Note: NAs have their own separate bin.
if (labelType == NumberType.I4)
{
var tmp = default(VBuffer <DvInt4>);
trans.GetSingleSlotValue(labelCol, ref tmp);
BinInts(ref tmp, ref labels, _numBins, out min, out lim);
_numLabels = lim - min;
}
else if (labelType == NumberType.R4)
{
var tmp = default(VBuffer <Single>);
trans.GetSingleSlotValue(labelCol, ref tmp);
BinSingles(ref tmp, ref labels, _numBins, out min, out lim);
_numLabels = lim - min;
}
else if (labelType == NumberType.R8)
{
var tmp = default(VBuffer <Double>);
trans.GetSingleSlotValue(labelCol, ref tmp);
BinDoubles(ref tmp, ref labels, _numBins, out min, out lim);
_numLabels = lim - min;
}
else if (labelType.IsBool)
{
var tmp = default(VBuffer <DvBool>);
trans.GetSingleSlotValue(labelCol, ref tmp);
BinBools(ref tmp, ref labels);
_numLabels = 3;
min = -1;
lim = 2;
}
else
{
Contracts.Assert(0 < labelType.KeyCount && labelType.KeyCount < Utils.ArrayMaxSize);
KeyLabelGetter <int> del = GetKeyLabels <int>;
var methodInfo = del.GetMethodInfo().GetGenericMethodDefinition().MakeGenericMethod(labelType.RawType);
var parameters = new object[] { trans, labelCol, labelType };
_labels = (int[])methodInfo.Invoke(this, parameters);
_numLabels = labelType.KeyCount + 1;
// No need to densify or shift in this case.
return;
}
// Densify and shift labels.
VBufferUtils.Densify(ref labels);
Contracts.Assert(labels.IsDense);
_labels = labels.Values;
if (labels.Length < _labels.Length)
{
Array.Resize(ref _labels, labels.Length);
}
for (int i = 0; i < _labels.Length; i++)
{
_labels[i] -= min;
Contracts.Assert(_labels[i] < _numLabels);
}
}
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();
}