[R] computationally singular error with mice()

Fei fayechen0807 at hotmail.com
Sat Nov 26 04:20:20 CET 2011

> imp<-mice(mydataframe, seed=1)
When trying the above command, I got the error term:

 iter imp variable
  1   1  medu
Error in solve.default(xtx + diag(pen)) : 
  system is computationally singular: reciprocal condition number =

What does that mean? How can I address this issue? My dataframe has 257
observations for 99 variables. Could this be the origin of the problem?
Could anyone helps me out? Thank you!


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