Creates a design matrix from the description. Any character variables are coerced to factors.
Arguments
- x
An object.
- ...
Passed down to other methods (mainly
model.matrix()).
Examples
data(mtcars)
model <- lm(am ~ vs, data = mtcars)
get_modelmatrix(model)
#> (Intercept) vs
#> Mazda RX4 1 0
#> Mazda RX4 Wag 1 0
#> Datsun 710 1 1
#> Hornet 4 Drive 1 1
#> Hornet Sportabout 1 0
#> Valiant 1 1
#> Duster 360 1 0
#> Merc 240D 1 1
#> Merc 230 1 1
#> Merc 280 1 1
#> Merc 280C 1 1
#> Merc 450SE 1 0
#> Merc 450SL 1 0
#> Merc 450SLC 1 0
#> Cadillac Fleetwood 1 0
#> Lincoln Continental 1 0
#> Chrysler Imperial 1 0
#> Fiat 128 1 1
#> Honda Civic 1 1
#> Toyota Corolla 1 1
#> Toyota Corona 1 1
#> Dodge Challenger 1 0
#> AMC Javelin 1 0
#> Camaro Z28 1 0
#> Pontiac Firebird 1 0
#> Fiat X1-9 1 1
#> Porsche 914-2 1 0
#> Lotus Europa 1 1
#> Ford Pantera L 1 0
#> Ferrari Dino 1 0
#> Maserati Bora 1 0
#> Volvo 142E 1 1
#> attr(,"assign")
#> [1] 0 1