DataSeries access question

[ETFVoyageur]

The obvious way to accumulate a value in DataSeries ds is:

ds.Set( ds[1] + <new value>)

The problem is initialization -- ds[1] will not be valid the first time. How do I check whether or not ds[1] will be valid? I tried ds.ContainsValue(1), but that gets an "object reference not set" error. I do not see a ds.Length property.

Do I really have to keep my own Boolean flag, rather than checking something about the DataSeries itself?

Thanks,
EV

[NinjaTrader_Bertrand]

EV, correct there's no Length property, but a Count that would give you the # of elements in your series. So you could run your cumulation only if there's x elements present.

[koganam]

The obvious way to accumulate a value in DataSeries ds is:

ds.Set( ds[1] + <new value>)

The problem is initialization -- ds[1] will not be valid the first time. How do I check whether or not ds[1] will be valid? I tried ds.ContainsValue(1), but that gets an "object reference not set" error. I do not see a ds.Length property.

Do I really have to keep my own Boolean flag, rather than checking something about the DataSeries itself?

Thanks,
EV

if (CurrentBar > 0)  ds.Set( ds[1] + <new value>);

[ETFVoyageur]

Thanks for your suggestions. After a good night's sleep I found the problem -- a simple typo that did compile.

Even so, this forum was helpful -- I found the typo when preparing a reply showing what I was doing. Forced me to take another close look, and fresh eyes found the problem.

--EV