Transform data to the longitudinal balanced format
Transforms a longitudinal data set in the unbalanced format to the balanced format.
to.balanced(data, id.col, time.col, Y.col, other.col = NA)
data |
a data frame with longitudinal data in the unbalanced format. That is, in the format of 'one row per observation'. |
id.col |
a column number, or column name, in the data frame |
time.col |
a column number, or column name, in the data frame
|
Y.col |
a vector of column numbers, or column names, of longitudinal
variables, and/or time dependent covariates in the data frame |
other.col |
a vector of column numbers, or column names, of baseline
covariates, and/or other subject level data, as for example, survival data.
Default does not include |
A data frame with longitudinal data in the balanced format. The balanced format is considered in this context as the format where each row has data on each subject. Notice that in this format we will have multiple columns for the same longitudinal variable, each corresponding to the variable observed at each time point.
Ines Sousa (isousa@math.uminho.pt)
simul <- data.frame(num = 1:10,
Y1.1 = rnorm(10), Y1.2 = rnorm(10),
Y2.1 = rnorm(10), Y2.2 = rnorm(10),
age = rnorm(10))
simul <- to.unbalanced(simul, id.col = 1, times = c(1, 2),
Y.col = 2:5, other.col = 6)
simul <- to.balanced(simul, id.col = "num", time.col = "time",
Y.col = c("Y1.1", "Y2.1"), other.col = "age")Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.