How to use TKDE for smoothing an histogram?

Dear rooters,

I would like to use a smooth version of binned data (the shape is roughtly a “Lorentzian + constant”). I noticed that the class TKDE could be used for that. Is there a way to provide binned data to the TKDE object?

Thank you in advance.

Best regards,

ROOT Version: 6.10
Platform: CC7
Compiler: gcc 4.8

Did you already took a look at the $(ROOTSYS)/tutorials/math/exampleTKDE.C tutorial?

It doesn’t really make sense to provide binned data to a KDE. A KDE typically places a kernel (usually a Gaussian) centered at each data point. The smoothed distribution is then constructed from the sum of these kernels. By providing binned data you limit the final resolution of the smooth distribution. Is there a problem with providing the full data set?

Also, there is a signature that allows for a weighting at each data point that should work:

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