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student_models
2012 Nov 20
0
Multilevel analysis using nlme (lme) . Error using z-scores
...udents_score)
## Estimate a model with random slopes based on IQ
for each municipality.
##Again: z_IQ is plain IQ, money_per_municipiality
does not very between municipialities
# THIS runs without an error
studentModel<- lme(z_sscore ~ IQ +
money_per_municipality, data=la,random=~IQ|mun,method="ML")
# THIS causes an error. The only difference is one
variable (z_IQ instead of IQ)
studentModel<- lme(z_sscore ~ z_IQ +
money_per_municipality, data=la,rand...