Hi Frank,
Before calling CopyEntries, you must also call CopyAddresses.
See example of logic in TTree::CloneTree.
Rene Brun
On Wed, 28
Apr 2004, Frank Winklmeier wrote:
> Hi,
>
> I am trying to copy a bunch of entries from one TTree to another tree. The
> two trees are not identical in the sense that they are cloned, but they
> are created by the same program and do have exactly the same branch
> structure. Both trees have 100 entries. I clone the first tree and then
> copy all the entries of the second tree into that cloned tree. If I look
> at the result, the tree has 200 entries as expected, but all entries from
> 100-199 are just a pure copy of the last entry (row 99) from the first
> tree.
>
> Is that problem due to the fact that the two trees are not clones of each
> other? What other way does exist to do this?
>
> Thanks a lot,
> Frank
>
>
> Here is the dump of what I did:
>
>
> root [0] TFile f1("tree1.root")
> root [1] TFile f2("tree2.root")
> root [3] TTree *t1 = (TTree*)f1.Get("xtree0")
> root [4] TTree *t2 = (TTree*)f2.Get("xtree0")
> root [10] TTree *t = t1.CloneTree()
> root [13] t->CopyEntries(t2)
>
>
> root [27] t1.Scan("event:runNumber:m0Pi0")
> ************************************************
> * Row * event * runNumber * m0Pi0 *
> ************************************************
> * 0 * 9 * 2001390 * 0.1335917 *
> * 1 * 9 * 2001390 * 0.1256038 *
> * 2 * 9 * 2001390 * 0.1335917 *
> * 3 * 9 * 2001390 * 0.1256038 *
> * 4 * 23 * 2001390 * 0.1468004 *
> * 5 * 23 * 2001390 * 0.1468004 *
> * 6 * 51 * 2001390 * 0.1362163 *
> * 7 * 51 * 2001390 * 0.1362163 *
> * 8 * 51 * 2001390 * 0.1356228 *
> * 9 * 51 * 2001390 * 0.1345639 *
> * 10 * 51 * 2001390 * 0.1345639 *
> * 11 * 51 * 2001390 * 0.1385371 *
> * 12 * 51 * 2001390 * 0.1371339 *
> * 13 * 51 * 2001390 * 0.1362163 *
> * 14 * 51 * 2001390 * 0.1362163 *
> * 15 * 51 * 2001390 * 0.1356228 *
> * 16 * 51 * 2001390 * 0.1345639 *
> * 17 * 51 * 2001390 * 0.1345639 *
> [...]
> * 87 * 57 * 2001390 * 0.1214628 *
> * 88 * 57 * 2001390 * 0.1445160 *
> * 89 * 57 * 2001390 * 0.1413400 *
> * 90 * 57 * 2001390 * 0.1165381 *
> * 91 * 57 * 2001390 * 0.1186514 *
> * 92 * 57 * 2001390 * 0.1197978 *
> * 93 * 57 * 2001390 * 0.1495328 *
> * 94 * 57 * 2001390 * 0.1340009 *
> * 95 * 57 * 2001390 * 0.1446459 *
> * 96 * 57 * 2001390 * 0.1280189 *
> * 97 * 57 * 2001390 * 0.1156140 *
> * 98 * 57 * 2001390 * 0.1295630 *
> * 99 * 57 * 2001390 * 0.1490336 *
> Type <CR> to continue or q to quit ==>
> ************************************************
> (Int_t)100
>
>
> root [28] t2.Scan("event:runNumber:m0Pi0")
> ************************************************
> * Row * event * runNumber * m0Pi0 *
> ************************************************
> * 0 * 1 * 3108727 * 0.1276106 *
> * 1 * 1 * 3108727 * 0.1447114 *
> * 2 * 1 * 3108727 * 0.1456810 *
> * 3 * 1 * 3108727 * 0.1407276 *
> * 4 * 1 * 3108727 * 0.1185576 *
> * 5 * 1 * 3108727 * 0.1172628 *
> * 6 * 1 * 3108727 * 0.1307614 *
> * 7 * 1 * 3108727 * 0.1276106 *
> * 8 * 1 * 3108727 * 0.1447114 *
> * 9 * 1 * 3108727 * 0.1456810 *
> * 10 * 1 * 3108727 * 0.1407276 *
> * 11 * 1 * 3108727 * 0.1315951 *
> * 12 * 1 * 3108727 * 0.1176189 *
> * 13 * 1 * 3108727 * 0.1307017 *
> * 14 * 1 * 3108727 * 0.1185576 *
> * 15 * 1 * 3108727 * 0.1172628 *
> * 16 * 1 * 3108727 * 0.1307614 *
> * 17 * 1 * 3108727 * 0.1276106 *
> * 18 * 1 * 3108727 * 0.1315951 *
> * 19 * 1 * 3108727 * 0.1176189 *
> * 20 * 1 * 3108727 * 0.1307017 *
> [...]
> * 88 * 3 * 3108727 * 0.1259598 *
> * 89 * 3 * 3108727 * 0.1259598 *
> * 90 * 3 * 3108727 * 0.1259598 *
> * 91 * 3 * 3108727 * 0.1327762 *
> * 92 * 3 * 3108727 * 0.1218557 *
> * 93 * 3 * 3108727 * 0.1459794 *
> * 94 * 3 * 3108727 * 0.1330480 *
> * 95 * 3 * 3108727 * 0.1344597 *
> * 96 * 3 * 3108727 * 0.1311320 *
> * 97 * 3 * 3108727 * 0.1332011 *
> * 98 * 3 * 3108727 * 0.1438569 *
> * 99 * 3 * 3108727 * 0.1477233 *
> Type <CR> to continue or q to quit ==>
> ************************************************
> (Int_t)100
>
>
> root [31] t.Scan("event:runNumber:m0Pi0")
> ************************************************
> * Row * event * runNumber * m0Pi0 *
> ************************************************
> * 0 * 9 * 2001390 * 0.1335917 *
> * 1 * 9 * 2001390 * 0.1256038 *
> * 2 * 9 * 2001390 * 0.1335917 *
> * 3 * 9 * 2001390 * 0.1256038 *
> * 4 * 23 * 2001390 * 0.1468004 *
> * 5 * 23 * 2001390 * 0.1468004 *
> * 6 * 51 * 2001390 * 0.1362163 *
> * 7 * 51 * 2001390 * 0.1362163 *
> * 8 * 51 * 2001390 * 0.1356228 *
> * 9 * 51 * 2001390 * 0.1345639 *
> * 10 * 51 * 2001390 * 0.1345639 *
> * 11 * 51 * 2001390 * 0.1385371 *
> * 12 * 51 * 2001390 * 0.1371339 *
> * 13 * 51 * 2001390 * 0.1362163 *
> * 14 * 51 * 2001390 * 0.1362163 *
> * 15 * 51 * 2001390 * 0.1356228 *
> * 16 * 51 * 2001390 * 0.1345639 *
> [...]
> * 95 * 57 * 2001390 * 0.1446459 *
> * 96 * 57 * 2001390 * 0.1280189 *
> * 97 * 57 * 2001390 * 0.1156140 *
> * 98 * 57 * 2001390 * 0.1295630 *
> * 99 * 57 * 2001390 * 0.1490336 *
> Type <CR> to continue or q to quit ==>
> * 100 * 57 * 2001390 * 0.1490336 *
> * 101 * 57 * 2001390 * 0.1490336 *
> * 102 * 57 * 2001390 * 0.1490336 *
> * 103 * 57 * 2001390 * 0.1490336 *
> * 104 * 57 * 2001390 * 0.1490336 *
> * 105 * 57 * 2001390 * 0.1490336 *
> [...]
> * 195 * 57 * 2001390 * 0.1490336 *
> * 196 * 57 * 2001390 * 0.1490336 *
> * 197 * 57 * 2001390 * 0.1490336 *
> * 198 * 57 * 2001390 * 0.1490336 *
> * 199 * 57 * 2001390 * 0.1490336 *
> Type <CR> to continue or q to quit ==>
> ************************************************
> (Int_t)200
>
>
>
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