[R-sig-Geo] problem about ST COVARIANCE

[claudia.kappa at libero.it]

Dear list,
I try to calculate spatio-temporal COVARIANCE for r5to10 STFDF (as seen in 
gstat vignette).
I'm using the following command:

vv=variogram(PM10~1,r5to10[,1:200], width=20, cutoff=200, covariance=TRUE)

but I see this error:

Error in VgmAverage(ret, ...) : unused argument (covariance = TRUE)
In addition: There were 50 or more warnings (use warnings() to see the first 
50)


Could you help me with this?

Thanks

Claudia