universal kriging gives error

hello

when I try universal kriging, it gives this error:

 > v.trend <- variogram(z~x+y,el4)
 > new.fit <- fit.variogram(v.trend, vgm(1,"Exp",300,1))
 > krige(el4$z~el4$x+el4$y,el4, model=new.fit, newdata=mask_SG)

Error in gstat.formula.predict(d$formula, newdata, na.action = na.action) :
        NROW(locs) != NROW(X): this should not occur
In addition: Warning messages:
1: 'newdata' had 42705 rows but variable(s) found have 7998 rows
2: 'newdata' had 42705 rows but variable(s) found have 7998 rows

regards

  

temiz wrote:

hello

when I try universal kriging, it gives this error:

 > v.trend <- variogram(z~x+y,el4)
 > new.fit <- fit.variogram(v.trend, vgm(1,"Exp",300,1))
 > krige(el4$z~el4$x+el4$y,el4, model=new.fit, newdata=mask_SG)

Error in gstat.formula.predict(d$formula, newdata, na.action = 
na.action) :
        NROW(locs) != NROW(X): this should not occur
In addition: Warning messages:
1: 'newdata' had 42705 rows but variable(s) found have 7998 rows
2: 'newdata' had 42705 rows but variable(s) found have 7998 rows

regards

  

Please use the form

krige(z~x+y, el4, mask_SG, new.fit)

as x+y need to be resolved from both el4 and mask_SG -- how to get 
coordinates named el4$x from mask_SG otherwise?
-- 
Edzer