Make emitter subset by comparing x, y and z uncertainties

[cleterrier]

Hi,

In an emitter set, I'd like to filter emitters, not by comparing uncertainties to a fixed value (as done in the Filter notebook), but by comparing uncertainty values between x,y and z.

More precisely, I'd like to keep only emitters that have uncertainty in z (uncz) larger than uncertainty in both x (uncx) and y (uncy).

Or alternatively, uncz larger than the composite xy uncertainty: uncz>sqrt(uncx^2 + uncy^2))

What would be the Python line(s) to do this?

Thanks @ASpeiser @Haydnspass

[ASpeiser]

The syntax is very similar for all these cases:

[cleterrier]

Thanks!