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age1
2011 Feb 28
3
Measuring correlations in repeated measures data
...where the model is:
fit <- lmer(distance ~ age + (1 | Subject), data=Orthodont)
I would like to measure the correlation b/t the variable "distance" at different ages such that I would have a matrix of correlation coefficients like the following:
age08 age09 age10 age11 age12 age13 age14
age08 1
age09 1
age10 1
age11 1
age12 1
age13 1
age14 1
The idea would be to demonstrate that the correlations b/t repeated measures of the vari...