Freya,
Thanks for the prompt response.
|> In real emergencies you can just create a character string with your cut
|> in there.
|>
|> for example:
|>
|> int somevalue = 5;
|> ostringstream mystream;
|> mystream << "run = runlist[" << somevalue << "]" << endl;
|> string thestring = mystream.str();
|> ntuple.Draw("run", thestring.c_str() );
|>
|> I know this works, although it's definitely not the most elegant
|> solution. (It *is* the solution I ended up using)
|>
|> if you get a more 'root-minded' response I would appreciate it if you
|> forwarded it to me.
I got what I would call a 'C-minded' response which was
to use 'sprintf' to write a string to be used as the second
argument of the 'Draw' command.
It wound up looking something like
------------
char *run = new Char[5];
char runnum[5] = "123";
strncpy(run,runnum,4);
sprintf(runcut,"run==%s",run);
chain.Draw("histvar",runcut);
----------
and it worked. I think very similar to what you propose,
just using something more like C than C++.
If I hear something more 'root-minded', I will
send it your way.
Thanks again.
Best regards,
Lars
--
______________________________________
Lars Ewell
Brookhaven National Laboratory
PHENIX Group
Physics Dept. 510C
Upton, NY 11973
ewell@bnl.gov
Phone (631)344-7070
FAX (631)344-3253
www http://www.phenix.bnl.gov/~ewell
_____________________________________
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