[Rivet] flat2aida and small numbers

[Andy Buckley]

Hendrik Hoeth wrote:
> Hi,
> 
> in flat2aida we are writing errors and values as %f, which leads to
> lines like this in the aida file:
> 
>   <measurement errorPlus="0.000003" value="0.000009" errorMinus="0.000003"/>
> 
> Are there any technical reasons (e.g. about the rivet aida reader) not
> to use %s instead, which in this example would give us:
> 
>   <measurement errorPlus="2.82e-06" value="9.46e-06" errorMinus="2.82e-06"/>

Just slackness when we wrote it, I think: scientific notation would be
much better. Although I think it should be %e rather than %s: the latter
actually means "string", so if it works, it's just lucky that it's
giving that format. %e explicitly means "represent float as exponential".

Can you make the change, and also check whether aida2flat suffers from a
similar formatting problem?

Thanks,
Andy

-- 
Dr Andy Buckley
Institute for Particle Physics Phenomenology
Durham University
0191 3343798 | 0191 3732613 | www.insectnation.org