feature request: supporting `buildmer` class objects

buildmer makes it easy to perform stepwise elimination of mixed-effects models fit and it would be nice if this is supported in broom.mixed-

library(buildmer)

m <- buildlme(Reaction ~ Days + (Days | Subject), data = lme4::sleepstudy)
#> Determining predictor order
#> Fitting via lm: Reaction ~ 1
#> Currently evaluating LRT for: Days
#> Fitting via lm: Reaction ~ 1 + Days
#> Updating formula: Reaction ~ 1 + Days
#> Fitting via gls (because REML was requested): Reaction ~ 1 + Days
#> Currently evaluating LRT for: 1 | Subject
#> Fitting via lme, with REML: Reaction ~ 1 + Days, random=~1 | Subject
#> Updating formula: Reaction ~ 1 + Days + (1 | Subject)
#> Currently evaluating LRT for: Days | Subject
#> Fitting via lme, with REML: Reaction ~ 1 + Days, random=~1 + Days | Subject
#> Updating formula: Reaction ~ 1 + Days + (1 + Days | Subject)
#> Fitting ML and REML reference models
#> Fitting via lme, with REML: Reaction ~ 1 + Days, random=~1 + Days | Subject
#> Fitting via lme, with ML: Reaction ~ 1 + Days, random=~1 + Days | Subject
#> Testing terms
#> Fitting via lme, with REML: Reaction ~ 1 + Days, random=~1 | Subject
#>   grouping term           block     score          LRT Iteration
#> 1     <NA>    1         NA NA 1        NA           NA         1
#> 2     <NA> Days      NA NA Days -32.67300           NA         1
#> 3  Subject    1    NA Subject 1 -56.86469           NA         1
#> 4  Subject Days NA Subject Days -22.11155 2.495021e-10         1
#> All terms are significant

summary(m)
#> Linear mixed-effects model fit by REML
#>  Data: lme4::sleepstudy 
#>        AIC      BIC    logLik
#>   1755.628 1774.719 -871.8141
#> 
#> Random effects:
#>  Formula: ~1 + Days | Subject
#>  Structure: General positive-definite, Log-Cholesky parametrization
#>             StdDev    Corr  
#> (Intercept) 24.740241 (Intr)
#> Days         5.922103 0.066 
#> Residual    25.591843       
#> 
#> Fixed effects: Reaction ~ 1 + Days 
#>                 Value Std.Error  DF  t-value p-value
#> (Intercept) 251.40510  6.824516 161 36.83853       0
#> Days         10.46729  1.545783 161  6.77151       0
#>  Correlation: 
#>      (Intr)
#> Days -0.138
#> 
#> Standardized Within-Group Residuals:
#>         Min          Q1         Med          Q3         Max 
#> -3.95355735 -0.46339976  0.02311783  0.46339621  5.17925089 
#> 
#> Number of Observations: 180
#> Number of Groups: 18

^{Created on 2019-09-29 by the reprex package (v0.3.0)}

Session info

``` r devtools::session_info() #> - Session info ---------------------------------------------------------- #> setting value #> version R version 3.6.1 (2019-07-05) #> os Windows 10 x64 #> system x86_64, mingw32 #> ui RTerm #> language (EN) #> collate English_United States.1252 #> ctype English_United States.1252 #> tz Europe/London #> date 2019-09-29 #> #> - Packages -------------------------------------------------------------- #> package * version date lib source #> assertthat 0.2.1 2019-03-21 [1] CRAN (R 3.6.0) #> backports 1.1.4 2019-04-10 [1] CRAN (R 3.6.0) #> boot 1.3-23 2019-07-05 [1] CRAN (R 3.6.1) #> buildmer * 1.3 2019-09-28 [1] CRAN (R 3.6.1) #> callr 3.3.2 2019-09-22 [1] CRAN (R 3.6.1) #> cli 1.1.0 2019-03-19 [1] CRAN (R 3.6.0) #> crayon 1.3.4 2017-09-16 [1] CRAN (R 3.5.1) #> desc 1.2.0 2019-04-03 [1] Github (r-lib/desc@c860e7b) #> devtools 2.2.1 2019-09-24 [1] CRAN (R 3.6.1) #> digest 0.6.21 2019-09-20 [1] CRAN (R 3.6.1) #> ellipsis 0.3.0 2019-09-20 [1] CRAN (R 3.6.1) #> evaluate 0.14 2019-05-28 [1] CRAN (R 3.6.0) #> fs 1.3.1 2019-05-06 [1] CRAN (R 3.6.0) #> glue 1.3.1 2019-03-12 [1] CRAN (R 3.6.0) #> highr 0.8 2019-03-20 [1] CRAN (R 3.6.0) #> htmltools 0.3.6 2017-04-28 [1] CRAN (R 3.5.1) #> knitr 1.25 2019-09-18 [1] CRAN (R 3.6.1) #> lattice 0.20-38 2018-11-04 [2] CRAN (R 3.6.1) #> lme4 1.1-21 2019-03-05 [1] CRAN (R 3.6.0) #> magrittr 1.5 2014-11-22 [1] CRAN (R 3.5.1) #> MASS 7.3-51.4 2019-03-31 [1] CRAN (R 3.6.0) #> Matrix 1.2-17 2019-03-22 [1] CRAN (R 3.6.0) #> memoise 1.1.0 2017-04-21 [1] CRAN (R 3.6.0) #> mgcv 1.8-29 2019-09-20 [1] CRAN (R 3.6.1) #> minqa 1.2.4 2014-10-09 [1] CRAN (R 3.5.1) #> nlme 3.1-140 2019-05-12 [2] CRAN (R 3.6.1) #> nloptr 1.2.1 2018-10-03 [1] CRAN (R 3.5.1) #> pkgbuild 1.0.5 2019-08-26 [1] CRAN (R 3.6.1) #> pkgload 1.0.2 2018-10-29 [1] CRAN (R 3.6.0) #> plyr 1.8.4 2016-06-08 [1] CRAN (R 3.5.1) #> prettyunits 1.0.2 2015-07-13 [1] CRAN (R 3.5.1) #> processx 3.4.1 2019-07-18 [1] CRAN (R 3.6.1) #> ps 1.3.0 2018-12-21 [1] CRAN (R 3.6.0) #> R6 2.4.0 2019-02-14 [1] CRAN (R 3.6.0) #> Rcpp 1.0.2 2019-07-25 [1] CRAN (R 3.6.1) #> remotes 2.1.0 2019-06-24 [1] CRAN (R 3.6.0) #> rlang 0.4.0 2019-06-25 [1] CRAN (R 3.6.0) #> rmarkdown 1.15 2019-08-21 [1] CRAN (R 3.6.1) #> rprojroot 1.3-2 2018-01-03 [1] CRAN (R 3.5.1) #> sessioninfo 1.1.1 2018-11-05 [1] CRAN (R 3.6.0) #> stringi 1.4.3 2019-03-12 [1] CRAN (R 3.6.0) #> stringr 1.4.0 2019-02-10 [1] CRAN (R 3.6.0) #> testthat 2.2.1 2019-07-25 [1] CRAN (R 3.6.1) #> usethis 1.5.1.9000 2019-09-12 [1] Github (r-lib/usethis@a2342b8) #> withr 2.1.2 2018-03-15 [1] CRAN (R 3.5.1) #> xfun 0.9 2019-08-21 [1] CRAN (R 3.6.1) #> yaml 2.2.0 2018-07-25 [1] CRAN (R 3.5.1) #> #> [1] C:/Users/inp099/Documents/R/win-library/3.6 #> [2] C:/Program Files/R/R-3.6.1/library ```

bbolker / broom.mixed

feature request: supporting `buildmer` class objects #79