更新合适的R mgcv：：bam模型报告无效类型(关闭).'';错误

这可能应该是一条 comments ，但我无法重现您的问题

事实上我可以(我以为您在您的示例中加载了mtcars，但当我在判断实际上没有重置为干净的mtcars后重置时，您没有这样做.

但这也指出了解决方案.从西蒙在?bam.update中所写的内容来看:

如果对原始适合进行加权，则必须包括weights列

如果我将模型设置为使用weights而不是model_weigts，我就可以实现这个目标[sic]:

r$> library(data.table) 
    library(mgcv) 
     
    mtcars <- data.table(mtcars) 
     
    # adding arbitrary "model_weigts" 
    set.seed(55) 
    mtcars[, weights := abs(rnorm(nrow(mtcars)))] 
     
    # split the dataset 
    mtcars_1 <- mtcars[1:20,] 
    mtcars_2 <- mtcars[21:32,] 
     
    # an arbitrary model formula  
    formula_c <- formula(mpg ~ s(wt) + s(hp)) 
     
    # fit the initial model to mtcars_1 and attempt to update it with mtcars_2 
    model_initial <- mgcv::bam(formula_c, data = mtcars_1, weights =  weights) 
    model_updated <- mgcv::bam.update(model_initial, data = mtcars_2)           
r$>

注意没有错误.我看到

r$> model_updated$weights                                                       
 [1] 0.120139084 1.812376850 0.151582984 1.119221005 0.001908206 1.188518494
 [7] 0.505343855 0.099234393 0.305353199 0.198409703 0.048910950 0.843233767
[13] 2.075270771 0.360763148 0.637689661 0.366278030 2.355363898 1.093377235
[19] 0.285841001 0.993657777 1.519271950 1.497117849 0.819615308 1.066050411
[25] 0.733755906 0.960343958 0.692180983 1.405998395 1.633538987 0.261830993
[31] 1.564754415 0.314589303
r$> mtcars_1$weights                                                            
 [1] 0.120139084 1.812376850 0.151582984 1.119221005 0.001908206 1.188518494
 [7] 0.505343855 0.099234393 0.305353199 0.198409703 0.048910950 0.843233767
[13] 2.075270771 0.360763148 0.637689661 0.366278030 2.355363898 1.093377235
[19] 0.285841001 0.993657777
r$> mtcars_2$weights                                                            
 [1] 1.5192720 1.4971178 0.8196153 1.0660504 0.7337559 0.9603440 0.6921810
 [8] 1.4059984 1.6335390 0.2618310 1.5647544 0.3145893
r$> all.equal(model_updated$weights, c(mtcars_1$weights, mtcars_2$weights))     
[1] TRUE

因此，除了原始数据和权重之外，bam()更新了适合，以包括新的观察结果，并使用其权重.

这是与:

─ Session info ───────────────────────────────────────────────────────────────
 setting  value
 version  R version 4.3.3 (2024-02-29)
 os       Ubuntu 20.04.6 LTS
 system   x86_64, linux-gnu
 ui       X11
 language en_GB:en
 collate  en_GB.UTF-8
 ctype    en_GB.UTF-8
 tz       Europe/Copenhagen
 date     2024-04-18
 pandoc   2.5 @ /usr/bin/pandoc

─ Packages ───────────────────────────────────────────────────────────────────
 package     * version date (UTC) lib source
 cli           3.6.2   2023-12-11 [1] RSPM (R 4.3.2)
 data.table  * 1.15.4  2024-03-30 [1] RSPM (R 4.3.3)
 lattice       0.22-6  2024-03-20 [1] RSPM (R 4.3.3)
 Matrix        1.6-5   2024-01-11 [1] RSPM (R 4.3.2)
 mgcv        * 1.9-1   2023-12-21 [1] CRAN (R 4.3.3)
 nlme        * 3.1-164 2023-11-27 [1] RSPM (R 4.3.2)
 sessioninfo   1.2.2   2021-12-06 [1] RSPM (R 4.3.0)

 [1] /home/au690221/R/x86_64-pc-linux-gnu-library/4.3
 [2] /usr/local/lib/R/site-library
 [3] /usr/lib/R/site-library
 [4] /usr/lib/R/library

──────────────────────────────────────────────────────────────────────────────