[R] Working with temporal data

[Sérgio Nunes]

Hi,

I have several files with data in this format:

20070102
20070102
20070106
20070201
...

The data is sorted and each line represents a date (YYYYMMDD). I would
like to analyze this data using R. For instance, I would like to have
a histogram by year, month or day.

I've already made a simple Perl script that aggregates this data but I
believe that R can be much more powerful and easy on this kind of
work.

Any suggestions on where to start?

Thanks in advance,
Sérgio Nunes