[R] covariance of equal date values

[Scott, Uriel]

Maybe try something along these lines:

Suppose the time series value vectors are x1 and x2 and the dates vectors
are
dates1 and dates2.

names(x1) <- dates1
names(x2) <- dates2

commonDates <- intersect( dates1 , dates2 )
desiredCovariance <- cov( x1[commonDates] , x2[commonDates] , use="c" )



> -----Original Message-----
> From:	Lukas Kubin [SMTP:lukas.kubin at permonik.com]
> Sent:	Tuesday, February 26, 2002 5:16 AM
> To:	r-help at stat.math.ethz.ch
> Subject:	[R] covariance of equal date values
> 
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> I need to count the covariance of two time series. Both of them contain
> the dates' vector and vector of values. But the dates are not the same. It
> means some dates of first ts are not in the second respectively. And I
> need the covariance of same dates, of course.
> Could anyone help me, please?
> Thank you.
> 
> lukas
> 
> - -- 
> Lukas Kubin
> lukas.kubin at permonik.com
> phone: 00420603836180
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