/// <summary>
/// Creates columns based of the columns properties argument
/// </summary>
/// <param name="colProp"></param>
/// <returns></returns>
private ColumnData CreateColumn(MetaColumn colProp)
{
//determine column type
ColumnType colType;
if (colProp.Type.Equals("Numeric", StringComparison.OrdinalIgnoreCase))
{
colType = ColumnType.Numeric;
}
else if (colProp.Type.Equals("Binary", StringComparison.OrdinalIgnoreCase))
{
colType = ColumnType.Binary;
}
else if (colProp.Type.Equals("Category", StringComparison.OrdinalIgnoreCase) || colProp.Type.Equals("Categorical", StringComparison.OrdinalIgnoreCase))
{
colType = ColumnType.Category;
}
else
{
colType = ColumnType.Unknown;
}
//determine encoding for category column type
CategoryEncoding colEncoding;
if (colProp.Encoding.Equals("Level", StringComparison.OrdinalIgnoreCase))
{
colEncoding = CategoryEncoding.Level;
}
else if (colProp.Encoding.Equals("1 out of N-1", StringComparison.OrdinalIgnoreCase) ||
colProp.Encoding.Equals("OnevsAll_1", StringComparison.OrdinalIgnoreCase))
{
colEncoding = CategoryEncoding.OnevsAll_1;
}
else if (colProp.Encoding.Equals("1 out of N", StringComparison.OrdinalIgnoreCase) ||
colProp.Encoding.Equals("OnevsAll", StringComparison.OrdinalIgnoreCase))
{
colEncoding = CategoryEncoding.OnevsAll;
}
else
{
colEncoding = CategoryEncoding.None;
}
//create column data type
var isOutput = colProp.Param.Equals("Output", StringComparison.OrdinalIgnoreCase);
ColumnData col = new ColumnData(isOutput);
if (colProp.Scale.Equals("MinMax", StringComparison.OrdinalIgnoreCase))
{
col.SetNormalization(Scaling.MinMax);
}
else if (colProp.Scale.Equals("Gauss", StringComparison.OrdinalIgnoreCase))
{
col.SetNormalization(Scaling.Gauss);
}
else if (colProp.Scale.Equals("None", StringComparison.OrdinalIgnoreCase))
{
col.SetNormalization(Scaling.None);
}
else
{
col.SetNormalization(Scaling.None);
}
//set missing value action
if (colProp.MissingValue.Equals("Ignore", StringComparison.OrdinalIgnoreCase))
{
col.MissingValue = MissingValue.Ignore;
}
else if (colProp.MissingValue.Equals("Average", StringComparison.OrdinalIgnoreCase))
{
col.MissingValue = MissingValue.Average;
}
else if (colProp.MissingValue.Equals("Random", StringComparison.OrdinalIgnoreCase))
{
col.MissingValue = MissingValue.Random;
}
else if (colProp.MissingValue.Equals("Mode", StringComparison.OrdinalIgnoreCase))
{
col.MissingValue = MissingValue.Mode;
}
else if (colProp.MissingValue.Equals("Max", StringComparison.OrdinalIgnoreCase))
{
col.MissingValue = MissingValue.Max;
}
else
{
col.MissingValue = MissingValue.Min;
}
//set column name and type
col.Name = colProp.Name;
col.ColumnDataType = colType;
col.Encoding = colEncoding;
col.Id = colProp.Id;
col.Index = colProp.Index;
return(col);
}
