[R] frequency() source code

Prof Brian Ripley ripley at stats.ox.ac.uk
Tue Nov 8 18:18:59 CET 2005

On Tue, 8 Nov 2005, bob mccall wrote:

> Thanks for the replys and the link. I'll look through that file. I 
> couldn't understand why frequency() returns 1 when quarterly seasonal 
> data is used. Maybe I can find out looking at the code.

Note that frequency only reads off the information in an object, e.g.

> frequency(presidents)
[1] 4

comes from

> tsp(presidents)
[1] 1945.00 1974.75    4.00

You may know you have quarterly data, but did you tell R?  Is it even 
known to R as a time series?

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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