[R-sig-ME] help: error in fn(x, ...): Downdated VtV is not positive definite
@m@engwork @ending from gm@il@com
Thu Jul 19 21:14:34 CEST 2018
I got a following error message while running a MLM using lme4 package.
Error in fn(x, ...) : Downdated VtV is not positive definite
my model was as following:
out <- lmer(situ ~ cult*change + (change || id) + (0 + frace | type), data
= tidy.total, REML=FALSE)
cult: factor (coded in 1 and -1)
How could I fix this issue?
Thanks a lot,
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