[R] V4Error in factor(x[, type == (-2)]

[ya]

 Dear list,

I am trying to impute the missing values for the first level variables in a two 
level data set using MICE package. Here is my code and error I got:

> aa=mice(a,maxit=0)
> aaa=aa$pred
> aaa
    V1 V2 V3 V4 V5 V6 V7 V8 V9 V10
V1   0  0  0  0  0  0  0  0  0   0
V2   0  0  0  0  0  0  0  0  0   0
V3   0  0  0  0  0  0  0  0  0   0
V4   1  1  1  0  1  1  1  1  1   1
V5   1  1  1  1  0  1  1  1  1   1
V6   1  1  1  1  1  0  1  1  1   1
V7   1  1  1  1  1  1  0  1  1   1
V8   1  1  1  1  1  1  1  0  1   1
V9   1  1  1  1  1  1  1  1  0   1
V10  0  0  0  0  0  0  0  0  0   0
> aaa["V4",]=c(2,2,2,0,0,0,0,0,0,-2)
> aaaa=mice(a,meth=c("","","","2l.norm","","","","","",""))

 iter imp variable
  1   1  V4Error in factor(x[, type == (-2)], labels = 1:n.class) : 
  invalid labels; length 2 should be 1 or 0

The class variable is –2. Random effects 2, and fixed effects 1, not in the 
model: 0. Can anyone give me some advice please?
Thank you very much.

Best regards,

ya

 

 
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