public static DataFrameColumnBase Clone(DataFrameColumnBase source)
{
switch (DataFrameTypeHelper.GetDataFrameType(source.DataType))
{
case DataFrameType.Object: return(new DataFrameColumn <Object>((DataFrameColumn <Object>)(source)));
case DataFrameType.Decimal: return(new DataFrameColumn <Decimal>((DataFrameColumn <Decimal>)(source)));
case DataFrameType.Double: return(new DataFrameColumn <Double>((DataFrameColumn <Double>)(source)));
case DataFrameType.Single: return(new DataFrameColumn <Single>((DataFrameColumn <Single>)(source)));
case DataFrameType.Int64: return(new DataFrameColumn <Int64>((DataFrameColumn <Int64>)(source)));
case DataFrameType.Int32: return(new DataFrameColumn <Int32>((DataFrameColumn <Int32>)(source)));
case DataFrameType.Int16: return(new DataFrameColumn <Int16>((DataFrameColumn <Int16>)(source)));
case DataFrameType.Byte: return(new DataFrameColumn <Byte>((DataFrameColumn <Byte>)(source)));
case DataFrameType.SByte: return(new DataFrameColumn <SByte>((DataFrameColumn <SByte>)(source)));
case DataFrameType.String: return(new DataFrameColumn <String>((DataFrameColumn <String>)(source)));
case DataFrameType.Boolean: return(new DataFrameColumn <Boolean>((DataFrameColumn <Boolean>)(source)));
}
throw new ArgumentException("Unknown DataFrameType");
}
public static DataFrame FromDataTable(DataTable table)
{
var df = new DataFrame();
var rowCount = table.Rows.Count;
foreach (DataColumn column in table.Columns)
{
var name = column.ColumnName;
df.DefineNewColumn(name, DataFrameColumnFactory.Create(column.DataType, df, rowCount, 0));
}
var columns = new DataFrameColumnBase[df.ColumnCount];
for (var i = 0; i < columns.Length; ++i)
{
columns[i] = df.GetColumn(i);
}
foreach (DataRow row in table.Rows)
{
for (var i = 0; i < columns.Length; ++i)
{
columns[i].AddObject(row[i]);
}
}
return(df);
}
internal abstract void AddColumn(DataFrameColumnBase column);
