Error(s) in re-building vignettes:
  ...
--- re-building ‘automation.Rmd’ using rmarkdown

Attaching package: 'xspliner'

The following object is masked from 'package:graphics':

    xspline

randomForest 4.7-1.1
Type rfNews() to see new features/changes/bug fixes.
Quitting from lines 23-33 (automation.Rmd) 
Error: processing vignette ‘automation.Rmd’ failed with diagnostics:
there is no package called 'factorMerger'
--- failed re-building ‘automation.Rmd’

--- re-building ‘cases.Rmd’ using rmarkdown
Welcome to DALEX (version: 2.4.2).
Find examples and detailed introduction at: http://ema.drwhy.ai/


Attaching package: 'DALEX'

The following object is masked _by_ '.GlobalEnv':

    HR

Loading required package: ggplot2

Attaching package: 'ggplot2'

The following object is masked from 'package:randomForest':

    margin

Loading required package: lattice
Quitting from lines 37-48 (cases.Rmd) 
Error: processing vignette ‘cases.Rmd’ failed with diagnostics:
there is no package called 'factorMerger'
--- failed re-building ‘cases.Rmd’

--- re-building ‘discrete.Rmd’ using rmarkdown
Quitting from lines 88-95 (discrete.Rmd) 
Error: processing vignette ‘discrete.Rmd’ failed with diagnostics:
there is no package called 'factorMerger'
--- failed re-building ‘discrete.Rmd’

--- re-building ‘extras.Rmd’ using rmarkdown
Warning in mgcv::pcls(G) :
  initial point very close to some inequality constraints
Warning in mgcv::pcls(G) :
  initial parameters very close to inequality constraints
Warning in mgcv::pcls(G) :
  initial point very close to some inequality constraints
Warning in mgcv::pcls(G) :
  initial parameters very close to inequality constraints
Warning in mgcv::pcls(G) :
  initial point very close to some inequality constraints
Warning in mgcv::pcls(G) :
  initial parameters very close to inequality constraints
Warning in mgcv::pcls(G) :
  initial point very close to some inequality constraints
Warning in mgcv::pcls(G) :
  initial parameters very close to inequality constraints
ptratio fits better than xs(ptratio). Using bare component.
--- finished re-building ‘extras.Rmd’

--- re-building ‘graphics.Rmd’ using rmarkdown
Loading required package: nlme
This is mgcv 1.8-40. For overview type 'help("mgcv-package")'.
--- finished re-building ‘graphics.Rmd’

--- re-building ‘methods.Rmd’ using rmarkdown
Quitting from lines 17-32 (methods.Rmd) 
Error: processing vignette ‘methods.Rmd’ failed with diagnostics:
there is no package called 'factorMerger'
--- failed re-building ‘methods.Rmd’

--- re-building ‘xspliner.Rmd’ using rmarkdown
--- finished re-building ‘xspliner.Rmd’

SUMMARY: processing the following files failed:
  ‘automation.Rmd’ ‘cases.Rmd’ ‘discrete.Rmd’ ‘methods.Rmd’

Error: Vignette re-building failed.
Execution halted