From: zaldy <zaldy_at_neutrino.kek.jp>

Date: Fri, 2 Sep 2005 21:36:49 +0900 (JST)

Date: Fri, 2 Sep 2005 21:36:49 +0900 (JST)

Hi,

I been using the method

TF1 * intg = new ...

intg->Integral(a,b);

but unfortunately don't have an idea if this kind of integration limits [-infinity, infinity] are possible or implemented in root into some kind of a "TRICK" thing.

If they do, then I just wanted to know how to explicitly write them in the program;

But if they don't exist (I mean it's not possible) then maybe its VERY unfortunate; after all infinity means always infinity.....(:.

Although I think that a very very very large number can be interpreted as an infinity limit, but it is difficult to determine because infinity has no bound.

Zaldy N.

*> zaldy wrote:*

*> > Hi,*

*> > *

*> > How do you write infinity if we integrate from -infinity to infinity in the*

*> > ff:*

*> > *

*> > TF1 * intg = new ...*

*> > intg->Integral(-infinity, infinity);*

*> > ^^^^^^^^^ ^^^^^^^^ Sorry just miss this thing (:.*

*> > *

*> > Thanks*

*> Hi,*

*> since ROOT does a numerical integration "-inf, +inf" limits*

*> dont make sense if you dont have an 2 * inf fast computer.*

*> Cheers*

*> Otto*

*> *

*> *

-- Zaldy A. NawangReceived on Fri Sep 02 2005 - 14:40:48 MEST

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