- using R version 4.4.0 (2024-04-24)
- using platform: x86_64-apple-darwin20
- R was compiled by
Apple clang version 14.0.0 (clang-1400.0.29.202)
GNU Fortran (GCC) 12.2.0
- running under: macOS Ventura 13.3.1
- using session charset: UTF-8
- checking for file ‘mlr3pipelines/DESCRIPTION’ ... OK
- this is package ‘mlr3pipelines’ version ‘0.5.2’
- package encoding: UTF-8
- checking package namespace information ... OK
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- checking whether package ‘mlr3pipelines’ can be installed ... [19s/22s] OK
See the install log for details.
- checking installed package size ... OK
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- checking ‘build’ directory ... OK
- checking DESCRIPTION meta-information ... OK
- checking top-level files ... OK
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- checking R files for syntax errors ... OK
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- checking for unstated dependencies in examples ... OK
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- checking files in ‘vignettes’ ... OK
- checking examples ... [6s/7s] ERROR
Running examples in ‘mlr3pipelines-Ex.R’ failed
The error most likely occurred in:
> ### Name: mlr_graphs_stacking
> ### Title: Create A Graph to Perform Stacking.
> ### Aliases: mlr_graphs_stacking pipeline_stacking
>
> ### ** Examples
>
> ## Don't show:
> if (requireNamespace("rpart")) {
+ ## End(Don't show)
+ if (requireNamespace("kknn")) {
+ library(mlr3)
+ library(mlr3learners)
+
+ base_learners = list(
+ lrn("classif.rpart", predict_type = "prob"),
+ lrn("classif.kknn", predict_type = "prob")
+ )
+ super_learner = lrn("classif.log_reg")
+
+ graph_stack = pipeline_stacking(base_learners, super_learner)
+ graph_learner = as_learner(graph_stack)
+ graph_learner$train(tsk("german_credit"))
+ }
+ ## Don't show:
+ }
Loading required namespace: kknn
Error in library(mlr3learners) :
there is no package called ‘mlr3learners’
Execution halted
- checking for unstated dependencies in ‘tests’ ... OK
- checking tests ... [176s/110s] OK
Running ‘testthat.R’ [176s/110s]
- checking for unstated dependencies in vignettes ... OK
- checking package vignettes ... OK
- checking re-building of vignette outputs ... [12s/12s] OK
- checking PDF version of manual ... [23s/24s] OK
- DONE
Status: 1 ERROR
- using check arguments '--no-clean-on-error '