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Opened 8 years ago

Last modified 8 years ago

#34 new enhancement

Error bands need a lot of throws

Reported by: cwilkinson Owned by: somebody
Priority: major Milestone: Tuning paper, vxry
Component: component1 Version:
Keywords: Cc:

Description

I found that the error bands produced for even a single parameter are not very good for relatively small numbers of throws (100), for now this can be fixed by simply making more throws, although that is time intensive. In future, replacing the TProfile with a 1D hist for each bin, and fitting a Gaussian to the bin to get the error (for each y-axis bin) is probably better.

For the histograms used for fitting, a limited range (maybe +/-3 * RMS) and a variable number of bins (maybe sqrt(entries) would be wise.

Change History (2)

comment:1 Changed 8 years ago by Clarence Wret

I think this might be because the throws are Gaussian? When I run the throws flat across the +/- 1 sigma range 100 throws is certainly enough, although 50 isn't.

comment:2 Changed 8 years ago by Clarence Wret

Milestone: milestone2 → Tuning paper, vxry

Milestone renamed

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