ID x y
A 2 7
B 5 2
C 1 4
library(nlme)
y <- lme (Ec.En ~ C/N + (1|ID), data = d.df, str(d.df), random=~1|ID)
Error in 1 | ID :
operations are possible only for numeric, logical or complex types
Can someone help me? Why it doesn't work?
Thanks a lot for your time.
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