Returns weighting variable of a model.
Usage
get_weights(x, ...)
# Default S3 method
get_weights(x, remove_na = FALSE, null_as_ones = FALSE, ...)Value
The weighting variable, or NULL if no weights were specified.
If the weighting variable should also be returned (instead of NULL)
when all weights are set to 1 (i.e. no weighting),
set null_as_ones = TRUE.
Examples
data(mtcars)
set.seed(123)
mtcars$weight <- rnorm(nrow(mtcars), 1, .3)
# LMs
m <- lm(mpg ~ wt + cyl + vs, data = mtcars, weights = weight)
get_weights(m)
#> [1] 0.8318573 0.9309468 1.4676125 1.0211525 1.0387863 1.5145195 1.1382749
#> [8] 0.6204816 0.7939441 0.8663014 1.3672245 1.1079441 1.1202314 1.0332048
#> [15] 0.8332477 1.5360739 1.1493551 0.4100149 1.2104068 0.8581626 0.6796529
#> [22] 0.9346075 0.6921987 0.7813326 0.8124882 0.4939920 1.2513361 1.0460119
#> [29] 0.6585589 1.3761445 1.1279393 0.9114786
get_weights(lm(mpg ~ wt, data = mtcars), null_as_ones = TRUE)
#> [1] 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
# GLMs
m <- glm(vs ~ disp + mpg, data = mtcars, weights = weight, family = quasibinomial)
get_weights(m)
#> Mazda RX4 Mazda RX4 Wag Datsun 710 Hornet 4 Drive
#> 0.8318573 0.9309468 1.4676125 1.0211525
#> Hornet Sportabout Valiant Duster 360 Merc 240D
#> 1.0387863 1.5145195 1.1382749 0.6204816
#> Merc 230 Merc 280 Merc 280C Merc 450SE
#> 0.7939441 0.8663014 1.3672245 1.1079441
#> Merc 450SL Merc 450SLC Cadillac Fleetwood Lincoln Continental
#> 1.1202314 1.0332048 0.8332477 1.5360739
#> Chrysler Imperial Fiat 128 Honda Civic Toyota Corolla
#> 1.1493551 0.4100149 1.2104068 0.8581626
#> Toyota Corona Dodge Challenger AMC Javelin Camaro Z28
#> 0.6796529 0.9346075 0.6921987 0.7813326
#> Pontiac Firebird Fiat X1-9 Porsche 914-2 Lotus Europa
#> 0.8124882 0.4939920 1.2513361 1.0460119
#> Ford Pantera L Ferrari Dino Maserati Bora Volvo 142E
#> 0.6585589 1.3761445 1.1279393 0.9114786
m <- glm(cbind(cyl, gear) ~ mpg, data = mtcars, weights = weight, family = binomial)
get_weights(m)
#> Mazda RX4 Mazda RX4 Wag Datsun 710 Hornet 4 Drive
#> 8.318573 9.309468 11.740900 9.190373
#> Hornet Sportabout Valiant Duster 360 Merc 240D
#> 11.426650 13.630675 12.521023 4.963853
#> Merc 230 Merc 280 Merc 280C Merc 450SE
#> 6.351553 8.663014 13.672245 12.187386
#> Merc 450SL Merc 450SLC Cadillac Fleetwood Lincoln Continental
#> 12.322546 11.365253 9.165724 16.896813
#> Chrysler Imperial Fiat 128 Honda Civic Toyota Corolla
#> 12.642907 3.280119 9.683254 6.865301
#> Toyota Corona Dodge Challenger AMC Javelin Camaro Z28
#> 4.757570 10.280683 7.614185 8.594659
#> Pontiac Firebird Fiat X1-9 Porsche 914-2 Lotus Europa
#> 8.937370 3.951936 11.262025 9.414107
#> Ford Pantera L Ferrari Dino Maserati Bora Volvo 142E
#> 8.561266 15.137589 14.663210 7.291828