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2012 Apr 01
1
Degrees of Freedom for lme.
...So, INDEX1 is the column with brain volumns, and the predictors are gort and age, by time ID (time they were seen). I believe my data is set up the right way, but when I run it, I get DF for Intercept is 49, and DF for slope is 13? Why? lme.gort=lme(Volume ~ GORT_FLUENCY+AGE, random = ~ 1 | TIMEID, data = subset(vol_data, INDEX1=='LH_FUSIFORM'), na.action=na.omit) fit_vol_model1 <- function(df){ tryCatch(lme.gort <- lme(Volume ~ GORT_FLUENCY+AGE, random = ~ 1 | UID, data=df, na.action=na.omit), error=function(err) tag <<-1) data.frame(Term = rownames(anova(...