[Rivet] aidamerge

[Daniel Weyh]

Dear Hannes,

> Dear Riveties
> 
> adding several aida files works fine, only in some cases I get the error:
> 
> Traceback (most recent call last):
>   File "./aidamerge", line 65, in <module>
>     sum_err2 += h.getBin(i).getErr()**2
> OverflowError: (34, 'Numerical result out of range')
> 
> I guess it comes when a histo is not properly filled (fro example when a ratio is taken).
> Is there a way to prevent these error message, and to continue with the program ?

I added a patch to catch the exception, use float('inf') during summing up and in the write out step this 'inf' is converted to a vee..eery large float.
Does this work for you?

@others: Is this the way it should work - or should we somehow exclude such bins?!?

Cheers,
Daniel