Provides some spectrum statistics for the spectra
with names that match the
is not supplied, the default value of * is used
which matches all spectra.
The result is a list of dicts; one dict for each
spectrum that matches
dicts have the following members:
Name of the spectrum described by this element
A list of 0, 1 or two elements that are overflow counters for each axis.
Same as for overflows but the counters represent the number of underflows for each axis.
Note that the clear clears the over/underflow counters as well.