allow setting name of TStatistic or RDataFrame.Stats

[ynikitenko]

Explain what you would like to see improved and how.

I use RDataFrame.Stats. That does not allow setting the name of the resulting statistics. This is a pity, since RDataFrame by design allows producing many results at once.
At the same time, TStatistics does not allow changing the name after its creation.

As a result, printing statistics results in many columns with "OBJ: TStatistic".

It would be good to allow setting name to TStatistic. Alternatively, one may allow setting name in the RDataFrame.Stats method.

ROOT version

Any.

Installation method

any

Operating system

any

Additional context

No response

[ferdymercury]

would this work for you, for an object st of class TStatistic?

st.SetName("myname") ?

[ynikitenko]

would this work for you, for an object st of class TStatistic?

st.SetName("myname") ?

Yes, this looks good. Honestly, I would also check other ROOT objects for that property (like a check list for good design). I've also noted that there is no copy constructor for TStatistic (which could set a new name and mitigate that problem).
But this solution looks good and necessary. Thank you.