vario.transfo {RGeostats}  R Documentation 
Performs transformations between experimental variograms
vario.transfo(string, vario1 = NA, vario2 = NA, vlist = NA, oper=NA)
string 
Calculation string describing the transformation involving the experimental variograms, for all calculation directions. The user will refer to the variogram contents ("v1" for the first one, "v2" for the second one and so on), to the weight per lag or number of pairs ("w1" for the first one, "w2" for the second one, and so on). 
vario1 
The 
vario2 
The 
vlist 
An optional list of experimental variograms. This is used when the string involves a large number of experimental variograms (larger than 2). Note that when 'vlist' is used, 'vario1' and 'vario2' are ignored. 
oper 
Prior transformation to be performed on all variograms involved in the transformation string. It can be one of the following options:

The calculation string must be defined as a string (included within quotes), such as "w1*v1+w2*v2)/(w1+w2)".
Note that the resulting variance array is calculated using the same string, where "v1" stands for the variance of the first variogram and "v2" for the one of the second variogram. In the multivariate case, this is expanded to the array of variancecovariances. For this calculation, the weights "w1" and "w2" are replaced by 1.
No transformation is performed on the distances. The distances are copied from the first variogram ("v1").
As an example, the normalization of a variogram (called "vario") is obtained using the following syntax: vario.transfo("v1",vario1=vario,oper="norm")
The resulting experimental variogram