Reshape Data from Wide to Long

Helper function to reshape data for gmm_survey if in wide format.

Usage

wide_to_long(data, id_var, outcome_vars, time_values = NULL)

Arguments

data

Data frame in wide format

id_var

Character string, ID variable name

outcome_vars

Character vector of outcome variable names (ordered by time)

time_values

Optional numeric vector of time values (default: 0, 1, 2, ...)

Value

Data frame in long format

Examples

if (FALSE) { # \dontrun{
# Wide format data
wide_data <- data.frame(
  id = 1:100,
  y_t0 = rnorm(100),
  y_t1 = rnorm(100),
  y_t2 = rnorm(100)
)

# Convert to long
long_data <- wide_to_long(
  data = wide_data,
  id_var = "id",
  outcome_vars = c("y_t0", "y_t1", "y_t2")
)
} # }