Hi,
You have a array with 2 dimensions. The first dimension ranged
from 0 to MUO_-1 and the second dimentsion range from 0 to 2.
To draw the very first element
tup->Draw("MUO.trk[0][0]");
Otherwise
>tup->Draw("MUO.trk.P[0]")
is the same as
tup->Draw("MUO.trk.P[0][]")
and draw 3 values of P : P[0][0], P[0][1], P[0][2]
> tup->Draw("MUO.trk.P[][0]")
Draws MUO values of P: P[0][0], P[1][0], .... P[MUO-2][0], P[MUO-1][0]
Cheers,
Philippe.
-----Original Message-----
From: owner-roottalk@pcroot.cern.ch
[mailto:owner-roottalk@pcroot.cern.ch]On Behalf Of Elena Vataga
Sent: Monday, March 11, 2002 8:30 AM
To: roottalk@pcroot.cern.ch
Subject: [ROOT] Accesing arrays
Hello rooters!
Sorry for 'naive' question of beginner.
I have TTree with TClonesArray,
one of members in TObject is Array
Float_t P[3];
..
*............................................................................*
*Br 117 :MUO.trk.P[3] : P[MUO_] *
*Entries : 95000 : Total Size= 1293112 bytes File Size = 962230 *
*Baskets : 26 : Basket Size= 64000 bytes Compression= 1.34 *
*............................................................................*
Which is the correct way to draw the first entrance in this array:
tup->Draw("MUO.trk.P[0]")
or
tup->Draw("MUO.trk.P[][0]")
or
tup->Draw("MUO.trk.P[0][]")
?
Thank you in advance,
Elena
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