Hi all,
I have a problem when used function "boot.relimp" in package "relaimpo"
 
boot3=boot.relimp(lm3,b=1000,type="lmg",rela = TRUE) 
 
an error "calc.relimp.default.intern(cova, ...) : covg must be a positive definite covariance matrix or a data matrix / data frame with linearly independent columns". Do anyone know what happened here? When I changed "b=1000" to "b=9 (much smaller number of bootstrap)", there was no this error. By the way, the linear model "lm3" contains 15 variables. Thank you very much.
Yong

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