Reading slice with TTree Draw

[ebusato]

Hi Seb,

Writing slices of int or float64 to a TTree using croot seems to work fine, however, accessing those variables with TTree::Draw doesn't work. Is there a way to fix this ?

Emmanuel

[sbinet]

hum...

the following interactive ROOT session worked for me:

root [0] auto f = TFile::Open("event.root");
Warning in <TClass::Init>: no dictionary for class Event is available
Warning in <TClass::Init>: no dictionary for class Det is available
Warning in <TClass::Init>: no dictionary for class golang::goslice<double> is available

root [1] auto t = (TTree*)f->Get("tree");
root [2] t->Draw("evt.I:evt.S.Data");
Info in <TCanvas::MakeDefCanvas>:  created default TCanvas with name c1
![data](https://cloud.githubusercontent.com/assets/1070920/19312978/13f224a4-9095-11e6-9409-d2e268186dd5.png)

where event.root was generated with:
https://github.com/go-hep/examples/blob/master/croot/go-croot-ex-tree-02/main.go

my ROOT version: ROOT 6.06/08
(not sure if that's important.)
what's yours?

PS: I have attached the plot for t->Draw("evt.S.Data");

[sbinet]