Hi,
I do not know how to control the list of leafs that should be stored in
a Snapshot and more importantly filling a DataFrame with a snapshot
gives access to the wrong column.
In my test case, a csv file is parsed and the columns “fTicket” and “fCount”
are created. Next this tdf is processed and a column “data” is added that
contains structure elements data.fSYear, data.fEYear and data.fCount
(notice the duplication of the name).
(The column names are retrieved and it contains twice “fTicket” which is
not understood but not relevant for the real issue.)
A snapshot is made for just the column “fCount”. Retrieving it later
and summing it up gives the correct result. Also a snapshot is made
of all columns. After its retrieval and summing over the “fCount” column,
I find that actually “data.fCount” was summed.
Now the question is how can I distinguish between the “fCount” and
“data.fCount” columns ?
-Eddy
mytest.C (2.5 KB) ticket2.txt (85 Bytes)
_ROOT Version: 6.20.02
_Platform: MacOSX
Compiler: Not Provided