`R/joinerml-tidiers.R`

`augment.mjoint.Rd`

Augment accepts a model object and a dataset and adds
information about each observation in the dataset. Most commonly, this
includes predicted values in the `.fitted`

column, residuals in the
`.resid`

column, and standard errors for the fitted values in a `.se.fit`

column. New columns always begin with a `.`

prefix to avoid overwriting
columns in the original dataset.

Users may pass data to augment via either the `data`

argument or the
`newdata`

argument. If the user passes data to the `data`

argument,
it **must** be exactly the data that was used to fit the model
object. Pass datasets to `newdata`

to augment data that was not used
during model fitting. This still requires that all columns used to fit
the model are present.

Augment will often behavior different depending on whether `data`

or
`newdata`

is specified. This is because there is often information
associated with training observations (such as influences or related)
measures that is not meaningfully defined for new observations.

For convenience, many augment methods provide default `data`

arguments,
so that `augment(fit)`

will return the augmented training data. In these
cases augment tries to reconstruct the original data based on the model
object, with some varying degrees of success.

The augmented dataset is always returned as a tibble::tibble with the
**same number of rows** as the passed dataset. This means that the
passed data must be coercible to a tibble. At this time, tibbles do not
support matrix-columns. This means you should not specify a matrix
of covariates in a model formula during the original model fitting
process, and that `splines::ns()`

, `stats::poly()`

and
`survival::Surv()`

objects are not supported in input data. If you
encounter errors, try explicitly passing a tibble, or fitting the original
model on data in a tibble.

We are in the process of defining behaviors for models fit with various na.action arguments, but make no guarantees about behavior when data is missing at this time.

# S3 method for mjoint augment(x, data = x$data, ...)

x | An |
---|---|

data | A |

... | Additional arguments. Not used. Needed to match generic
signature only. |

A `tibble::tibble()`

with one row for each original observation
with addition columns:

population-level fitted values for the j-th longitudinal process

individuals-level fitted values for the j-th longitudinal process

population-level residuals for the j-th longitudinal process

individual-level residuals for the j-th longitudinal process

See `joineRML::fitted.mjoint()`

and `joineRML::residuals.mjoint()`

for
more information on the difference between population-level and
individual-level fitted values and residuals.

If fitting a joint model with a single longitudinal process,
make sure you are using a named `list`

to define the formula
for the fixed and random effects of the longitudinal submodel.

if (FALSE) { # Fit a joint model with bivariate longitudinal outcomes library(joineRML) data(heart.valve) hvd <- heart.valve[!is.na(heart.valve$log.grad) & !is.na(heart.valve$log.lvmi) & heart.valve$num <= 50, ] fit <- mjoint( formLongFixed = list( "grad" = log.grad ~ time + sex + hs, "lvmi" = log.lvmi ~ time + sex ), formLongRandom = list( "grad" = ~ 1 | num, "lvmi" = ~ time | num ), formSurv = Surv(fuyrs, status) ~ age, data = hvd, inits = list("gamma" = c(0.11, 1.51, 0.80)), timeVar = "time" ) # Extract the survival fixed effects tidy(fit) # Extract the longitudinal fixed effects tidy(fit, component = "longitudinal") # Extract the survival fixed effects with confidence intervals tidy(fit, ci = TRUE) # Extract the survival fixed effects with confidence intervals based # on bootstrapped standard errors bSE <- bootSE(fit, nboot = 5, safe.boot = TRUE) tidy(fit, boot_se = bSE, ci = TRUE) # Augment original data with fitted longitudinal values and residuals hvd2 <- augment(fit) # Extract model statistics glance(fit) }