joineR: summarybal – R documentation

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summarybal

Summary of a balanced longitudinal data set

Description

For a balanced longitudinal data set a vector of the mean response and variances at defined time points is returned along with the correlation matrix of the responses across the time points.

Usage

summarybal(object, Y.col, times, use = "all.obs", na.rm, ...)

Arguments

`object`	a longitudinal data set in the balanced format.
`Y.col`	the column numbers of the longitudinal measurements at each design time point in the `object`. This does not have to be all of the longitudinal measurements taken and may be a subset instead.
`times`	a vector of unique time points of the longitudinal measurements. This does not have to be all of the study time points and may be a subset instead, but should match the columns defined in `Y.col`.
`use`	an optional character string giving a method for computing covariances in the presence of missing values. This must be (an abbreviation of) one of the strings `"all.obs"`, `"complete.obs"` or `"pairwise.complete.obs"`. Defaults to `use = "all.obs"`.
`na.rm`	logical. Should missing values be removed? By default, `na.rm = FALSE`.
`...`	further arguments for the summary.

Value

A list with three elements:

`mean.vect`	a matrix with the time points in the first column and the mean response vector as the second column.
`variance`	The vector of variances for the response at the time points.
`cor.mtx`	Containing the correlation matrix of the responses between each pair of time points.

Author(s)

Ines Sousa (isousa@math.uminho.pt)

Examples

data(mental)
summarybal(mental, Y.col = 2:7, times = c(0, 1, 2, 4, 6, 8), na.rm = TRUE)

joineR

Joint Modelling of Repeated Measurements and Time-to-Event Data

v1.2.5

GPL-3 | file LICENSE

Authors

Pete Philipson [aut, cre] (<https://orcid.org/0000-0001-7846-0208>), Ines Sousa [aut] (<https://orcid.org/0000-0002-2712-1713>), Peter J. Diggle [aut] (<https://orcid.org/0000-0003-3521-5020>), Paula Williamson [aut] (<https://orcid.org/0000-0001-9802-6636>), Ruwanthi Kolamunnage-Dona [aut] (<https://orcid.org/0000-0003-3886-6208>), Robin Henderson [aut], Graeme L. Hickey [aut] (<https://orcid.org/0000-0002-4989-0054>), Maria Sudell [ctb], Medical Research Council [fnd] (Grant numbers: G0400615 and MR/M013227/1)

Initial release