Calculate influence measures for a linear model
Usage
tl_influence_measures(
model,
threshold_cook = NULL,
threshold_leverage = NULL,
threshold_dffits = NULL
)Value
A data frame with one row per observation containing influence
measures: cooks_distance, leverage, dffits,
std_residual, stud_residual, boolean flags for each
threshold (is_cook_influential, is_leverage_influential,
is_dffits_influential, is_outlier), per-coefficient
dfbetas_* columns, and an overall is_influential flag.
Threshold values are stored as attributes.
Examples
# \donttest{
model <- tl_model(mtcars, mpg ~ wt + hp, method = "linear")
tl_influence_measures(model)
#> observation cooks_distance leverage dffits
#> Mazda RX4 1 1.589652e-02 0.04427691 -0.218494101
#> Mazda RX4 Wag 2 5.464779e-03 0.04048669 -0.126664789
#> Datsun 710 3 2.070651e-02 0.06020097 -0.249103400
#> Hornet 4 Drive 4 4.724822e-05 0.04747494 0.011699160
#> Hornet Sportabout 5 2.736184e-04 0.03686288 0.028162679
#> Valiant 6 2.155064e-02 0.06715104 -0.253806124
#> Duster 360 7 1.255218e-02 0.11701542 -0.191618944
#> Merc 240D 8 1.677650e-02 0.11565615 0.221917842
#> Merc 230 9 2.188702e-03 0.06001631 0.079763706
#> Merc 280 10 1.554996e-03 0.04691083 -0.067222732
#> Merc 280C 11 1.215737e-02 0.04691083 -0.190099538
#> Merc 450SE 12 1.423008e-03 0.05619559 0.064280875
#> Merc 450SL 13 1.458960e-04 0.04123610 0.020560728
#> Merc 450SLC 14 6.266049e-03 0.04257292 -0.135714533
#> Cadillac Fleetwood 15 2.786686e-05 0.18577112 0.008984366
#> Lincoln Continental 16 1.780910e-02 0.20897838 0.227919348
#> Chrysler Imperial 17 4.236109e-01 0.18648721 1.231668760
#> Fiat 128 18 1.574263e-01 0.07990991 0.749153703
#> Honda Civic 19 9.371446e-03 0.12295814 0.165329646
#> Toyota Corolla 20 2.083933e-01 0.09950335 0.865985851
#> Toyota Corona 21 2.791982e-02 0.05303126 -0.292008465
#> Dodge Challenger 22 2.087419e-02 0.03571654 -0.253389811
#> AMC Javelin 23 2.751510e-02 0.03339813 -0.294709853
#> Camaro Z28 24 9.943527e-03 0.10298538 -0.170476763
#> Pontiac Firebird 25 1.443199e-02 0.04453321 0.207813200
#> Fiat X1-9 26 5.920440e-04 0.09225188 -0.041423665
#> Porsche 914-2 27 5.674986e-06 0.07078181 -0.004054382
#> Lotus Europa 28 7.353985e-02 0.15364135 0.471518032
#> Ford Pantera L 29 8.919701e-03 0.20442386 -0.161026362
#> Ferrari Dino 30 5.732672e-03 0.06704651 -0.129395315
#> Maserati Bora 31 2.720397e-01 0.39420816 0.907521354
#> Volvo 142E 32 5.600804e-03 0.04140623 -0.128232538
#> std_residual stud_residual is_cook_influential
#> Mazda RX4 -1.01458647 -1.01511928 FALSE
#> Mazda RX4 Wag -0.62332752 -0.61663091 FALSE
#> Datsun 710 -0.98475880 -0.98422728 FALSE
#> Hornet 4 Drive 0.05332850 0.05240355 FALSE
#> Hornet Sportabout 0.14644776 0.14395389 FALSE
#> Valiant -0.94769800 -0.94597876 FALSE
#> Duster 360 -0.53305899 -0.52637283 FALSE
#> Merc 240D 0.62035108 0.61364674 FALSE
#> Merc 230 0.32068555 0.31566819 FALSE
#> Merc 280 -0.30786160 -0.30300262 FALSE
#> Merc 280C -0.86081660 -0.85686281 FALSE
#> Merc 450SE 0.26776519 0.26343390 FALSE
#> Merc 450SL 0.10087865 0.09914150 FALSE
#> Merc 450SLC -0.65019507 -0.64359476 FALSE
#> Cadillac Fleetwood 0.01914207 0.01880925 FALSE
#> Lincoln Continental 0.44970228 0.44342961 FALSE
#> Chrysler Imperial 2.35451716 2.57247756 TRUE
#> Fiat 128 2.33192251 2.54205995 TRUE
#> Honda Civic 0.44781172 0.44155241 FALSE
#> Toyota Corolla 2.37861784 2.60515163 TRUE
#> Toyota Corona -1.22297829 -1.23394918 FALSE
#> Dodge Challenger -1.30026858 -1.31660890 FALSE
#> AMC Javelin -1.54564189 -1.58546759 FALSE
#> Camaro Z28 -0.50973308 -0.50312646 FALSE
#> Pontiac Firebird 0.96380569 0.96258469 FALSE
#> Fiat X1-9 -0.13220037 -0.12994022 FALSE
#> Porsche 914-2 -0.01494999 -0.01469003 FALSE
#> Lotus Europa 1.10241512 1.10667850 FALSE
#> Ford Pantera L -0.32270884 -0.31766698 FALSE
#> Ferrari Dino -0.48919397 -0.48268129 FALSE
#> Maserati Bora 1.11989090 1.12500838 TRUE
#> Volvo 142E -0.62369214 -0.61699651 FALSE
#> is_leverage_influential is_dffits_influential is_outlier
#> Mazda RX4 FALSE FALSE FALSE
#> Mazda RX4 Wag FALSE FALSE FALSE
#> Datsun 710 FALSE FALSE FALSE
#> Hornet 4 Drive FALSE FALSE FALSE
#> Hornet Sportabout FALSE FALSE FALSE
#> Valiant FALSE FALSE FALSE
#> Duster 360 FALSE FALSE FALSE
#> Merc 240D FALSE FALSE FALSE
#> Merc 230 FALSE FALSE FALSE
#> Merc 280 FALSE FALSE FALSE
#> Merc 280C FALSE FALSE FALSE
#> Merc 450SE FALSE FALSE FALSE
#> Merc 450SL FALSE FALSE FALSE
#> Merc 450SLC FALSE FALSE FALSE
#> Cadillac Fleetwood FALSE FALSE FALSE
#> Lincoln Continental TRUE FALSE FALSE
#> Chrysler Imperial FALSE TRUE FALSE
#> Fiat 128 FALSE TRUE FALSE
#> Honda Civic FALSE FALSE FALSE
#> Toyota Corolla FALSE TRUE FALSE
#> Toyota Corona FALSE FALSE FALSE
#> Dodge Challenger FALSE FALSE FALSE
#> AMC Javelin FALSE FALSE FALSE
#> Camaro Z28 FALSE FALSE FALSE
#> Pontiac Firebird FALSE FALSE FALSE
#> Fiat X1-9 FALSE FALSE FALSE
#> Porsche 914-2 FALSE FALSE FALSE
#> Lotus Europa FALSE FALSE FALSE
#> Ford Pantera L TRUE FALSE FALSE
#> Ferrari Dino FALSE FALSE FALSE
#> Maserati Bora TRUE TRUE FALSE
#> Volvo 142E FALSE FALSE FALSE
#> dfbetas__Intercept_ dfbetas_wt dfbetas_hp
#> Mazda RX4 -0.161347204 0.0639304305 0.032966471
#> Mazda RX4 Wag -0.069324050 -0.0004066495 0.045785122
#> Datsun 710 -0.211199646 0.0972314374 0.043374926
#> Hornet 4 Drive 0.002672687 0.0044886906 -0.006839301
#> Hornet Sportabout 0.001784844 -0.0015536931 0.009208434
#> Valiant -0.005985946 -0.1516565139 0.180374447
#> Duster 360 0.004705177 0.0781031774 -0.159988770
#> Merc 240D 0.034255292 0.1224118752 -0.189552940
#> Merc 230 0.019788247 0.0332570461 -0.055075623
#> Merc 280 -0.003198686 -0.0337297820 0.036709039
#> Merc 280C -0.009045583 -0.0953846390 0.103809696
#> Merc 450SE -0.026973686 0.0356973740 -0.005712458
#> Merc 450SL -0.003961562 0.0049302300 0.003399822
#> Merc 450SLC 0.031572445 -0.0400515832 -0.016800308
#> Cadillac Fleetwood -0.006420656 0.0075499557 -0.002577897
#> Lincoln Continental -0.168791258 0.1903129995 -0.058242601
#> Chrysler Imperial -0.924056752 0.9355996760 -0.148009806
#> Fiat 128 0.605181396 -0.1672758566 -0.311246566
#> Honda Civic 0.156388333 -0.0819144214 -0.034026915
#> Toyota Corolla 0.804669969 -0.4114605894 -0.170934240
#> Toyota Corona -0.231328587 0.0882138248 0.066064464
#> Dodge Challenger 0.003923967 -0.0888481611 0.049775308
#> AMC Javelin -0.019610048 -0.0734203131 0.037837437
#> Camaro Z28 0.029920076 0.0390740055 -0.128670440
#> Pontiac Firebird -0.058806962 0.0868742949 -0.002278294
#> Fiat X1-9 -0.037559007 0.0174261386 0.010208853
#> Porsche 914-2 -0.003655931 0.0020588013 0.000316321
#> Lotus Europa 0.423409344 -0.4072338373 0.188396749
#> Ford Pantera L -0.022536462 0.0999346699 -0.148176049
#> Ferrari Dino -0.065508308 0.0869804902 -0.085182962
#> Maserati Bora -0.007482815 -0.4999048760 0.865763737
#> Volvo 142E -0.080001907 0.0127537553 0.038406565
#> is_influential
#> Mazda RX4 FALSE
#> Mazda RX4 Wag FALSE
#> Datsun 710 FALSE
#> Hornet 4 Drive FALSE
#> Hornet Sportabout FALSE
#> Valiant FALSE
#> Duster 360 FALSE
#> Merc 240D FALSE
#> Merc 230 FALSE
#> Merc 280 FALSE
#> Merc 280C FALSE
#> Merc 450SE FALSE
#> Merc 450SL FALSE
#> Merc 450SLC FALSE
#> Cadillac Fleetwood FALSE
#> Lincoln Continental TRUE
#> Chrysler Imperial TRUE
#> Fiat 128 TRUE
#> Honda Civic FALSE
#> Toyota Corolla TRUE
#> Toyota Corona FALSE
#> Dodge Challenger FALSE
#> AMC Javelin FALSE
#> Camaro Z28 FALSE
#> Pontiac Firebird FALSE
#> Fiat X1-9 FALSE
#> Porsche 914-2 FALSE
#> Lotus Europa FALSE
#> Ford Pantera L TRUE
#> Ferrari Dino FALSE
#> Maserati Bora TRUE
#> Volvo 142E FALSE
# }