public bool MoveNext()
{
while (this.stack.Count > 0)
{
var itr = this.stack.Peek();
if (this.needMoveNext && !itr.MoveNext())
{
return(false);
}
this.needMoveNext = false;
var r = itr.Current;
if (r == null)
{
return(false);
}
if (r.Records.Count > 0)
{
itr = new RecordIterator(itr.Current, -1, this.forward);
this.stack.Push(itr);
}
while (true)
{
bool ok = itr.MoveNext();
if (ok)
{
return(true);
}
this.stack.Pop();
if (this.stack.Count == 0)
{
return(false);
}
itr = this.stack.Peek();
}
}
return(false);
}
/// <summary>
/// If a record contains a field that can't be parsed as a double, the whole
/// record is skipped.
/// </summary>
public static IDataSeries[] ReadDataSeries(RecordIterator it, bool useHeaders)
{
if (!it.MoveNext())
{
return(null);
}
IList <string> record = it.Current;
// read first record
int columns = record.Count;
if (columns < 1)
{
throw new ArgumentException();
}
DataSeries.ListDataSeries[] serieses = new DataSeries.ListDataSeries[columns];
for (int col = 0; col < columns; col++)
{
DataSeries.ListDataSeries series = new DataSeries.ListDataSeries("y" + col);
if (col == 0)
{
series.SetName("x");
}
else
{
series.SetDomain(serieses[0]);
}
serieses[col] = series;
}
if (useHeaders)
{
// first record contains header strings
for (int i = 0; i < record.Count && i < serieses.Length; i++)
{
serieses[i].SetName(record[i]);
}
record = it.Current;
}
while (true)
{
try
{
double[] values = new double[columns];
for (int col_1 = 0; col_1 < columns; col_1++)
{
values[col_1] = double.ValueOf(record[col_1]);
}
for (int col_2 = 0; col_2 < columns; col_2++)
{
serieses[col_2].Add(values[col_2]);
}
}
catch (NumberFormatException)
{
}
// skip whole record
if (!it.MoveNext())
{
break;
}
record = it.Current;
}
return(serieses);
}
