[R] Cross-correlation

Sven Garbade garbade at psy.uni-muenchen.de
Wed Apr 17 18:01:03 CEST 2002

Kaspar Pflugshaupt wrote:
> On 17.4.2002 16:55 Uhr, Sven Garbade wrote:
> > I want to recalculate an analysis found in a paper. An empirical time
> > series (velocities, altogether 241 data values) were cross-correlated
> > with an invertited cosine function (200 milliseconds duration).
> > Following the authors the resulting values should offer some advantages:
> > being independent of gain and peak latency differences between single
> > trials and preserving the temporal aspect of the modulation. Is there a
> > function to calculate cross-correlations in R? I think cor() is ot the
> > right one.
> You need the function ccf() in library(ts).

Thanks, but I'm wondering why the R search engine found nothing
appropriate for the keyword "cross-correlation".

By, Sven
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