Confidence band of quantile or QQ plot

ROOT
1

Hi,
I guess the confidence band of a quantile or QQ plot is not implemented yet in ROOT?

Cheers,
Zhiyi.

2

Hi,

I presume that you volunteer to code it up ?

Eddy

3

I made an example code to draw a QQ plot with a confidential level (CL) band. More detailed information could be found in the self-descriptive code.

Zhiyi.
example_QQwithBand.C (5.97 KB)

4

Hi,

Thank you for the nice example. We have already a class, TGraphQQ, to draw the QQ plots. See

root.cern.ch/root/htmldoc/TGraphQQ.html

We should maybe add the option to draw the CL band as in your example.
Best Regards

Lorenzo

5

Thanks for your comments.

Yes, I know the class. But it is just for an array of numbers, not for histograms (although QQ plots for histograms are not so precise depending on binning). It may be nicer to add one construct of the class to accept histograms, which may be more useful for users. Actually, my example is mainly showing how to add a CL band. :slight_smile:

Zhiyi.