Slide 57 not working

[fedemolina]

param_grid <- 
  param_grid %>%
  mutate( 
  specs = merge(., spec_knn_varying)
)

Error in as.data.frame.default(y) :
cannot coerce class ‘c("nearest_neighbor", "model_spec")’ to a data.frame

sessionInfo()
R version 3.6.2 (2019-12-12)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 18.04.3 LTS

Matrix products: default
BLAS: /usr/lib/x86_64-linux-gnu/openblas/libblas.so.3
LAPACK: /usr/lib/x86_64-linux-gnu/libopenblasp-r0.2.20.so

locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C LC_TIME=es_UY.UTF-8 LC_COLLATE=en_US.UTF-8
[5] LC_MONETARY=es_UY.UTF-8 LC_MESSAGES=en_US.UTF-8 LC_PAPER=es_UY.UTF-8 LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C LC_MEASUREMENT=es_UY.UTF-8 LC_IDENTIFICATION=C

attached base packages:
[1] parallel stats graphics grDevices utils datasets methods base

other attached packages:
[1] rstanarm_2.19.2 Rcpp_1.0.3 yardstick_0.0.4 tibble_2.1.3 rsample_0.0.5 tidyr_1.0.0
[7] recipes_0.1.9 purrr_0.3.3 parsnip_0.0.5 infer_0.5.1 dplyr_0.8.3 tidymodels_0.0.3
[13] sessioninfo_1.1.1 rpart_4.1-15 pROC_1.16.1 kknn_1.3.1 klaR_0.6-14 MASS_7.3-51.5
[19] ipred_0.9-9 glmnet_3.0-2 Matrix_1.2-18 ggrepel_0.8.1 earth_5.1.2 plotmo_3.5.6
[25] TeachingDemos_2.10 plotrix_3.7-7 Formula_1.2-3 e1071_1.7-3 doParallel_1.0.15 iterators_1.0.12
[31] foreach_1.4.7 dials_0.0.4 scales_1.1.0 caret_6.0-85 ggplot2_3.2.1 lattice_0.20-38
[37] broom_0.5.3 AmesHousing_0.0.3

loaded via a namespace (and not attached):
[1] backports_1.1.5 tidytext_0.2.2 plyr_1.8.5 igraph_1.2.4.2 lazyeval_0.2.2 splines_3.6.2
[7] crosstalk_1.0.0 listenv_0.8.0 SnowballC_0.6.0 rstantools_2.0.0 inline_0.3.15 digest_0.6.23
[13] htmltools_0.4.0 rsconnect_0.8.16 fansi_0.4.0 magrittr_1.5 globals_0.12.5 gower_0.2.1
[19] matrixStats_0.55.0 xts_0.11-2 prettyunits_1.0.2 colorspace_1.4-1 xfun_0.11 callr_3.4.0
[25] crayon_1.3.4 lme4_1.1-21 zeallot_0.1.0 survival_3.1-8 zoo_1.8-6 glue_1.3.1
[31] gtable_0.3.0 questionr_0.7.0 pkgbuild_1.0.6 rstan_2.19.2 shape_1.4.4 miniUI_0.1.1.1
[37] xtable_1.8-3 stats4_3.6.2 lava_1.6.6 StanHeaders_2.19.0 prodlim_2019.11.13 DT_0.11
[43] htmlwidgets_1.5.1 threejs_0.3.1 farver_2.0.1 pkgconfig_2.0.3 loo_2.2.0 nnet_7.3-12
[49] utf8_1.1.4 labeling_0.3 tidyselect_0.2.5 rlang_0.4.2 DiceDesign_1.8-1 reshape2_1.4.3
[55] later_1.0.0 munsell_0.5.0 tools_3.6.2 cli_2.0.0 generics_0.0.2 ggridges_0.5.2
[61] stringr_1.4.0 fastmap_1.0.1 knitr_1.26 ModelMetrics_1.2.2.1 processx_3.4.1 packrat_0.5.0
[67] future_1.15.1 nlme_3.1-143 mime_0.8 tokenizers_0.2.1 compiler_3.6.2 bayesplot_1.7.1
[73] shinythemes_1.1.2 rstudioapi_0.10 testthat_2.3.1 tidyposterior_0.0.2 stringi_1.4.3 highr_0.8
[79] ps_1.3.0 desc_1.2.0 nloptr_1.2.1 markdown_1.1 shinyjs_1.1 vctrs_0.2.1
[85] pillar_1.4.3 lifecycle_0.1.0 furrr_0.1.0 combinat_0.0-8 data.table_1.12.8 httpuv_1.5.2
[91] R6_2.4.1 promises_1.1.0 gridExtra_2.3 janeaustenr_0.1.5 codetools_0.2-16 pkgload_1.0.2
[97] boot_1.3-24 colourpicker_1.0 gtools_3.8.1 assertthat_0.2.1 rprojroot_1.2 withr_2.1.2
[103] shinystan_2.5.0 grid_3.6.2 timeDate_3043.102 class_7.3-15 minqa_1.2.4 tidypredict_0.4.3
[109] shiny_1.4.0 lubridate_1.7.4 base64enc_0.1-3 dygraphs_1.1.1.6

[fedemolina]

Not resolve