Re: Filling area under a curve

On Thu, Jun 08, 2006 at 10:49:31AM +0200, Olivier Couet wrote:

Hi!

> I suggested this approach because the description you made seemed close
> to this new functionality,

Yes. That's why I started compiling. ;)

> but it may well be that you need something else. Can you
> send me a small *running* example showing what you do ?

Included. It's modeled exactly like my script, I just simplified the Function and droped cosmetics. If you execute it you'll see "the inverse" of what I'd need. That is the lower left corner is clear whereas the upper right is filled in black.

> > > I have recently implemented this in TGraph. See
> > > $ROOTSYS/tutorials/graphpolar.C
> > > This has been introduced in the last ROOT release. See:
> > > http://root.cern.ch/root/Version511.news.html
> >
> > Just finished compiling it and tried your example. But I do
> > not see how to use it in my case. My problem is, that I have
> > something like z=f(x,y) and the area that I want to shade is
> > "everything below z=excl". Additionally I can not easily
> > solve f(x,y) for x or y analytically. That's why I used a
> > TH2F to raster the area. Did I miss something? Maybe there
> > is a way to extract the proper contour line easily into
> > arrays so I can fill it into a TGraph? Did I miss that?
> >
> > Thanks in advance!

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text/x-c++src attachment: Sample.C