obs: Extracts the observations used for the estimation

In fixest: Fast Fixed-Effects Estimations

Extracts the observations used for the estimation

Description

This function extracts the observations used in fixest estimation. The stats::case.names S3 method calls this function

Usage

obs(x)

## S3 method for class 'fixest'
case.names(object, ...)

Arguments

x	A fixest object.
object	A fixest object.
...	Ignored

Value

It returns a simple vector of integers.

Examples

base = iris
names(base) = c("y", "x1", "x2", "x3", "species")
base$y[1:5] = NA

# Split sample estimations
est_split = feols(y ~ x1, base, split = ~species)
(obs_setosa = obs(est_split[[1]]))
(obs_versi = obs(est_split[sample = "versi", drop = TRUE]))

est_versi = feols(y ~ x1, base, subset = obs_versi)

etable(est_split, est_versi)

fixest documentation built on March 18, 2026, 9:06 a.m.