Another way to analyze MARC records is <https://github.com/marktriggs/marcgrep>. Very fast but less handy than <http://en.pusc.it/bib/MARCgrep>.
Sorry, I'm not able to say if it is good for controlfields.
sb

On 20/mag/2013, at 13.12, dasos ili wrote:

> i have reviewed that, it is a good point for a start, but anything else that goes deeper? Or any hint on what would be useful to investigate? 
> 
> For example is there any meaning in taking into account quality control methods for the bibliographic records? For example, from this file we had that percentage of bad records, or tags, or subfields, etc
> 
> 
> 
> 
> ________________________________
> Απο: Stefano Bargioni <[log in to unmask]>
> Προς: [log in to unmask] 
> Στάλθηκε: 2:09 μ.μ. Δευτέρα, 20 Μαΐου 2013
> Θέμα: Re: [CODE4LIB] UNIMARC statistics
> 
> 
> <http://search.cpan.org/~crusoe/MARC-Record-Stats-v0.0.4/bin/marcstats.pl> can be useful, but generates no stats for leader or controlfields.
> Stefano
> 
> On 20/mag/2013, at 12.55, dasos ili wrote:
> 
>> Greetings,
>> 
>> i would appreciate it if you could please tell me if there is any research, or output, or any program that gets statistical analysis of the LEADER, all data fields, all subfields, controlfields. I would appreciate also your input on ideas for what should be analysed, what would be of interest for getting statistics for the UNIMARC records.
>> 
>> 
>> Thank you very much for your time
>> Looking forward for your input 
>> 
>