Created
June 22, 2011 17:23
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An example showing how to obtain the mean for each subject across multiple observations in a data frame
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| library(plyr) | |
| data = arrange(data.frame(ID=1:10, FA=runif(50, 0.2, 0.8)), ID) | |
| ddply(data, 'ID', mean) # using plyr library | |
| aggregate(data, list(ID=data$ID), mean) # using base |
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