TNtuple->Draw using Form

ROOT
1

Hi,

I have this trivial problem that I can’t resolve.

This is the complete macro (called prueba.cc), running on a server with Root Version 3.05/07 25 September 2004 (of course, I can’t change it, but it is not too old) :

{
int tankid=673;
Archive->Draw(“fDynodeAnode0:fTime”,Form(“fLsId==%d”,tankid),"");
//Archive->Draw(“fDynodeAnode0:fTime”,“fLsId==673”,"");
}

but I get this error message:
root [7] .x prueba.cc
Limitation: Variable argument is not supported for this platform FILE:prueba.cc LINE:3
*** Interpreter error recovered ***

of course, there is no problem when running with the commented line, and commenting the one with Form.

Then, I tried running the same code on my laptop with Root Version 4.04/02 8 June 2005, and “Voila!!!” it worked perfectly. (both ways of course).

Could someone please tell me if it is a problem of the root version, or I’m doing something wrong…

2

ROOT 3.05/07 is from July 2003 (not September 2004).
This version did not accept Form in a script.
This should be OK with versions 4 or newer.

Rene

3

well, you are right, the interpreter version is 2003. But installing a new version is not an option for me. So, what else can I use instead of Form? is there another way to use a variable inside a Draw function?

4

Ok, I already figured it out. This is the code that runs on the old version:

{
int tankid=673;
char tankidchar[20];
sprintf(tankidchar,“fLsId==%d”,tankid);
Archive->Draw(“fDynodeAnode0:fTime”,tankidchar,"");
//Archive->Draw(“fDynodeAnode0:fTime”,“fLsId==673”,"");

}

Thanks.

fede.