Projection of TH2F

ROOT
1

Hi everyone,

I want to draw a diagonal projection of TH2F. The TH2F is a Dalitz plot, how can I get the projection of “1-x-y”.

Any idea?

Bin

Does the question clear or not? Let me add some word to be more clear.
I got a TH2F plot, Now I knew how to get the projection of X or Y axis, but I don’t know how to get a custom projection, such as “1-x-y”.

Is there any usage or method to solve my difficult? If you knew the usage and method, pls share it with me.

Bin

2

Does the question clear or not? Let me add some word to be more clear.
I got a TH2F plot, Now I knew how to get the projection of X or Y axis, but I don’t know how to get a custom projection, such as “1-x-y”.

Is there any usage or method to solve my difficult? If you knew the usage and method, pls share it with me.

Bin

3

HI,

There is no method to do this in ROOT. If you have the original data you have used to fill the histogram (e.g. a tuple), I would directly make the projection using them.
Otherwise just use the histogram assuming all the bin data points are located at the (x,y) bin center values.

Best Regards

Lorenzo

4

[quote=“moneta”]HI,

There is no method to do this in ROOT. If you have the original data you have used to fill the histogram (e.g. a tuple), I would directly make the projection using them.
Otherwise just use the histogram assuming all the bin data points are located at the (x,y) bin center values.

Best Regards

Lorenzo[/quote]

Yes, I think it is the only way to solve the difficult.

Thank you.

Bin