model.matrix.fixest {fixest}R Documentation

Design matrix of a femlm model

Description

This function creates a design matrix of the linear part of a femlm, feols or feglm estimation. Note that it is only the linear part and the cluster variables (which can be considered as factors) are excluded from the matrix.

Usage

## S3 method for class 'fixest'
model.matrix(object, data, ...)

Arguments

object

A fixest object. Obtained using the functions femlm, feols or feglm.

data

If missing (default) then the original data is obtained by evaluating the call. Otherwise, it should be a data.frame.

...

Not currently used.

Value

It returns a design matrix.

Author(s)

Laurent Berge

See Also

See also the main estimation functions femlm, feols or feglm. formula.fixest, update.fixest, summary.fixest, vcov.fixest.

Examples


# simple estimation on iris data, clustering by "Species"
res = femlm(Sepal.Length ~ Sepal.Width*Petal.Length +
            Petal.Width | Species, iris)

head(model.matrix(res))




[Package fixest version 0.1.0 Index]