public void TestIndexer()
{
Data.DataFrame dataFrame = MakeDataFrameWithTwoColumns(length: 10);
var foo = dataFrame[0, 0];
Assert.Equal(0, dataFrame[0, 0]);
Assert.Equal(11, dataFrame[1, 1]);
Assert.Equal(2, dataFrame.Columns.Count);
Assert.Equal("Int1", dataFrame.Columns[0]);
var headList = dataFrame.Head(5);
Assert.Equal(14, (int)headList[4][1]);
var tailList = dataFrame.Tail(5);
Assert.Equal(19, (int)tailList[4][1]);
dataFrame[2, 1] = 1000;
Assert.Equal(1000, dataFrame[2, 1]);
var row = dataFrame[4];
Assert.Equal(14, (int)row[1]);
var column = dataFrame["Int2"] as PrimitiveColumn <int>;
Assert.Equal(1000, (int)column[2]);
Assert.Throws <ArgumentException>(() => dataFrame["Int5"]);
}
public static DataFrame MakeDataFrameWithTwoColumns(int length)
{
BaseColumn dataFrameColumn1 = new PrimitiveColumn <int>("Int1", Enumerable.Range(0, length).Select(x => x));
BaseColumn dataFrameColumn2 = new PrimitiveColumn <int>("Int2", Enumerable.Range(10, length).Select(x => x));
Data.DataFrame dataFrame = new Data.DataFrame();
dataFrame.InsertColumn(0, dataFrameColumn1);
dataFrame.InsertColumn(1, dataFrameColumn2);
return(dataFrame);
}
