我正在尝试将fit_resample（）与arima_reg（）一起使用，并且收到一条我无法理解的错误消息。
我正在使用以下代码：
library(modeltime)
library(tidymodels)
df<-data.frame(day=seq(as.Date("2020-1-1"), as.Date("2020-3-31"), "days"), value=sample(1:100, length(seq(as.Date("2020-1-1"), as.Date("2020-3-31"), "days"))))
splits<-sliding_window(df, lookback = Inf, skip=6, assess_start = 7, assess_stop = 14, complete = T)
arima_reg() %>% set_engine("auto_arima")%>% fit_resamples(value~day, data=df, resamples=splits)
我收到以下错误消息：
x Slice01：模型：错误：未提供日期或日期时间变量。请提供日期或日期时间变量作为...
x Slice02：模型：错误：未提供日期或日期时间变量。请提供日期或日期时间变量作为...
x Slice03：模型：错误：未提供日期或日期时间变量。请提供日期或日期时间变量作为...
相同的代码适用于其他模型，即适用于
linear_reg() %>% set_engine("lm")%>% fit_resamples(value~day, data=df, resamples=splits)
并且相同的数据无需重采样即可在auto_arima中使用，即：
arima_reg() %>% set_engine("auto_arima")%>% fit(value~day,data=df)
我有什么想念的吗？
R version 3.5.2 (2018-12-20)
Platform: x86_64-apple-darwin15.6.0 (64-bit)
Running under: macOS Mojave 10.14.6
Matrix products: default
BLAS: /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
LAPACK: /Library/Frameworks/R.framework/Versions/3.5/Resources/lib/libRlapack.dylib
locale:
[1] de_DE.UTF-8/de_DE.UTF-8/de_DE.UTF-8/C/de_DE.UTF-8/de_DE.UTF-8
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] yardstick_0.0.7 workflows_0.2.1 tune_0.1.1 tidyr_1.1.0 tibble_3.0.3 rsample_0.0.8 recipes_0.1.14
[8] purrr_0.3.4 parsnip_0.1.4 modeldata_0.1.0 infer_0.5.3 ggplot2_3.3.2 dplyr_1.0.1 dials_0.0.9
[15] scales_1.1.1 broom_0.7.2 tidymodels_0.1.1 modeltime_0.3.0
loaded via a namespace (and not attached):
[1] tseries_0.10-46 splines_3.5.2 foreach_1.4.4 warp_0.1.0 prodlim_2018.04.18
[6] RcppParallel_5.0.2 StanHeaders_2.21.0-6 assertthat_0.2.1 TTR_0.23-4 GPfit_1.0-8
[11] yaml_2.2.1 globals_0.12.4 ipred_0.9-8 pillar_1.4.6 backports_1.1.8
[16] lattice_0.20-38 glue_1.4.1 quadprog_1.5-5 pROC_1.16.2 digest_0.6.25
[21] snakecase_0.11.0 hardhat_0.1.4 colorspace_1.4-1 Matrix_1.2-15 plyr_1.8.4
[26] timeDate_3043.102 pkgconfig_2.0.3 lhs_1.0.1 DiceDesign_1.8-1 listenv_0.7.0
[31] slider_0.1.5 gower_0.1.2 lava_1.6.5 generics_0.0.2 ellipsis_0.3.1
[36] janitor_2.0.1 withr_2.2.0 furrr_0.1.0 urca_1.3-0 nnet_7.3-12
[41] cli_2.0.2 quantmod_0.4-13 survival_2.43-3 magrittr_1.5 crayon_1.3.4
[46] forecast_8.5 future_1.11.1.1 fansi_0.4.1 nlme_3.1-137 MASS_7.3-51.1
[51] xts_0.11-2 class_7.3-14 tools_3.5.2 lifecycle_0.2.0 stringr_1.4.0
[56] munsell_0.5.0 compiler_3.5.2 rlang_0.4.7 grid_3.5.2 iterators_1.0.10
[61] rstudioapi_0.11 timetk_2.5.0 gtable_0.3.0 codetools_0.2-15 fracdiff_1.4-2
[66] curl_4.3 R6_2.4.1 zoo_1.8-4 lubridate_1.7.4 stringi_1.4.6
[71] parallel_3.5.2 Rcpp_1.0.5 vctrs_0.3.2 rpart_4.1-13 tidyselect_1.1.0
[76] lmtest_0.9-36 ```