public void TestSummarizePerColumn()
{
var dm = DataMap.FromDictionary(new Hashtable()
{
{ "cat", new int[] { 1, 2, 1, 1, 3 } },
{ "value1", new string[] { "a", "b", "c", "d", "e" } },
{ "value2", new double[] { 10, 20, 30, 40, 50 } },
{ "value3", new double[] { 1, 2, 3, 4, 5 } },
});
var g = new GroupBy(dm, new string[] { "cat" }, new string[] { "cat", "value1", "value2", "value3" });
var s = g.Summarize(new[] { "value2", "value3" }, new Dictionary <string, string>()
{
{ "max", "Max" },
{ "min", "c => c.Min()" }
});
Assert.Equal(new[] { "cat", "max/value2", "min/value2", "max/value3", "min/value3" }, s.ColumnNames.ToArray());
Assert.Equal(typeof(int), s["cat"].DataType);
Assert.Equal(typeof(double), s["max/value2"].DataType);
Assert.Equal(typeof(double), s["min/value3"].DataType);
Assert.Equal(new int[] { 1, 2, 3 }, s["cat"].ToArray <int>());
Assert.Equal(new double[] { 40, 20, 50 }, s["max/value2"].ToArray <double>());
Assert.Equal(new double[] { 1, 2, 5 }, s["min/value3"].ToArray <double>());
}