private T[][] GetDataPerClass <T>(TableFixedData data, int columnIndex, IValueConverter <T> converter = null)
{
var retLists = new List <T> [data.ClassesValue.Length];
var rows = data.Count;
T[][] ret = new T[data.ClassesValue.Length][];
for (int index = 0; index < rows; index++)
{
var classValue = data.Class(index);
if (retLists[classValue] == null)
{
retLists[classValue] = new List <T>();
}
if (converter != null)
{
retLists[classValue].Add(converter.Convert(data[index, columnIndex]));
}
else
{
retLists[classValue].Add((T)data[index, columnIndex]);
}
}
for (int index = 0; index < data.ClassesValue.Length; index++)
{
ret[index] = retLists[index].ToArray();
}
return(ret);
}
public static DataSample[] ToSample(TableFixedData tableFixedData)
{
var samples = new DataSample[tableFixedData.Count];
for (int rowIndex = 0; rowIndex < tableFixedData.Count; rowIndex++)
{
var currentSample = new DataSample
{
DataPoints = new DataPoint[tableFixedData.Attributes.Length - 1],
ClassId = tableFixedData.Class(rowIndex)
};
int dataPointIndex = 0;
for (int columnIndex = 0; columnIndex < tableFixedData.Attributes.Length; columnIndex++)
{
if (tableFixedData.Attributes[columnIndex] != TableData.ClassAttributeName)
{
var value = tableFixedData[rowIndex, columnIndex];
var dataPoint = new DataPoint
{
ColumnId = columnIndex,
Value =
tableFixedData.IsDiscreteColumn(columnIndex)
? Convert.ToDouble(tableFixedData.GetSymbol(value.ToString(), columnIndex))
: Convert.ToDouble(value)
};
currentSample.DataPoints[dataPointIndex] = dataPoint;
dataPointIndex++;
}
}
samples[rowIndex] = currentSample;
}
return(samples);
}
