How to draw vector from TTree

Hi,

is possible to make an histogram using values (even some specific array element) written into a class B defined by me, which is insert into a vector, which is part of another class A defined by me that i use as branch in a tree? to descrive the situation my data is a stream composed more or less by packets of this kind:


 Header


 class B


 class B


 class B

…and so on…

I have defined two classes A, B.

class B{

int myval1;
float myval2;
int myval3[16]; <----- for instance suppose an array of temperatures
… and so on…

…some getter/setter for myval(s)…

}

class A {

vector myData

----> some header data <-----

…and some other variables…

…some getter/setter …
}

I create a tree using class A as branch then my question is: is possible to draw for the all the branch an histogram, for instance, of the 4-th element defined in var3?

Cheers
Maurizio

sorry but the HTML was enabled…
the class A is

class A {

vector myData

----> some header data <-----

…and some other variables…

…some getter/setter …
}

Hi,

This is possible only in ROOT 4.00/02 and later.
Just using the vector as a TClonesArray.

Cheers,
Philippe.