void testsdf(SimpleDf sdf, string startFilterDate, string endFilterDate)
{
sdf.OutputDebugInfoStatStr();
var tdf = SimpleDf.Copy(sdf, "tdf");
Debug.Log($"Copying completed");
Debug.Log($"Copied {tdf.InfoStr()}");
Debug.Log($"Cols: {tdf.InfoClassStr()}");
Debug.Log($"Cols: {tdf.InfoInversionsStr()}");
tdf.KeepColumns(new string[] { "Id", "Timestamp", "x", "y" });
//tdf = SimpleDf.SortOnColumn(tdf, "Timestamp", descend:true, quiet: false);
tdf.preferedFormat["Timestamp"] = "yyyy-MM-dd HH:mm:ss.fff";
var tblst = tdf.GetBoolFilter("Timestamp", startFilterDate, endFilterDate);
tdf = SimpleDf.Subset(tdf, "tdf", tblst);
tdf.MakeNewFloatCol("testcol", 0.0f, 3.14f);
tdf.FloatTimeFromDateString("Timestamp", "Elaptime");
tdf.preferedFormat["Elaptime"] = "f2";
tdf.WriteCsv("testcsvname.csv");
}