group_by_groups {semhelpinghands}

Group Estimates By Groups

Description

Groups parameter estimates or other information such as p-values into a table with groups as columns and parameters as rows.

Usage

group_by_groups(
  object,
  ...,
  col_names = "est",
  group_first = TRUE,
  group_labels = NULL,
  fit = NULL,
  use_standardizedSolution = FALSE
)

Arguments

object

A lavaan object or the output of lavaan::parameterEstimates() or lavaan::standardizedSolution().

...

Optional arguments to be passed to lavaan::parameterEstimates(). Ignored if object is an output of lavaan::parameterEstimates() or lavaan::standardizedSolution().

col_names

A vector of the column names in the parameter estimate tables to be included. Default is "est".

group_first

If TRUE, the columns will be grouped by groups first and then by columns in the parameter estimates tables. Default is TRUE.

group_labels

A character vector of group labels. Will be assigned to group id = 1, 2, 3, etc. If not provided. will try to be retrieved from object if it is a lavaan::lavaan object.

fit

Optional. A lavaan::lavaan object. If object is a parameter estimates table and group_labels is NULL, it will try to retrieve the group labels from fit is supplied.

use_standardizedSolution

If TRUE and object is not an estimates table, then lavaan::standardizedSolution() will be used to generate the table. If FALSE, the default, then lavaan::parameterEstimates() will be used if necessary.

Value

A data-frame-like object of the class est_table.

Author(s)

Shu Fai Cheung https://orcid.org/0000-0002-9871-9448

Examples

library(lavaan)
set.seed(5478374)
n <- 100
x <- runif(n) - .5
m <- .40 * x + rnorm(n, 0, sqrt(1 - .40))
y <- .30 * m + rnorm(n, 0, sqrt(1 - .30))
city <- sample(c("City Alpha", "City Beta"), 100,
               replace = TRUE)
dat <- data.frame(x = x, y = y, m = m, city = city)
model <-
'
m ~ c(a1, a2)*x
y ~ c(b1, b2)*m
a1b1 := a1*b1
a2b2 := a2*b2
'
fit <- sem(model, data = dat, fixed.x = FALSE,
           group = "city")
(est <- parameterEstimates(fit))

# Group them by groups
group_by_groups(fit)

# Can also work on a parameter estimates table
# To have group labels, need to supply the fit object
group_by_groups(est, fit = fit)

# Can be used with some other functions in semhelpinghands
# when used on a parameter estimates table
group_by_groups(filter_by(est, op = "~"), fit = fit)

# Also support piping
est |> filter_by(op = "~") |>
       group_by_groups(fit = fit)