Hi Jodi,
do:
event->Branch("eps",&eps,"eps/I");
event->Branch("epoch",epoch,"epoch[eps]/D");
event->Branch("mag",mag,"mag[eps]/D");
We do not support multiple variable length arrays in the same branch.
It is more efficient (storage-wise and time-wise) to have one branch
for each dynamic array.
Note that if your dynamic arrays are members of a class (see
$ROOTSYS/test/Event.h for example), with one single call to TTree::Branch,
you create automatically multiple sub-branches.
Rene Brun
On Wed, 25 Sep 2002, Jodi I Lamoureux wrote:
> Hi Rene,
>
> I need to make some branches that look a little like a
> column-wise ntuple. As a simple test, I added two arrays to a
> tree... see the example below. When I brows the leafs in root,
> they are identical. Both "epoch" and "mag" have identical
> values even though buff is 2*eps long and contains the epoch
> array followed by the mag array.
>
> // variable-length arrays:
> event->Branch("eps",&eps,"eps/I");
> event->Branch("lightCurve",buff,"epoch[eps]/D:mag[eps]/D");
>
> Can you send me an example of something like this that works?
> I would for example like to see the 2nd example in the user manual,
> "A Tree with a C Structure" that records all the structure elements
> in one branch.
>
> Thanks,
>
> Jodi Lamoureux
>
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