Error(s) in re-building vignettes:
  ...
--- re-building ‘dp.Rmd’ using rmarkdown
Quitting from lines 30-41 (dp.Rmd) 
Error: processing vignette 'dp.Rmd' failed with diagnostics:
VECTOR_ELT() can only be applied to a 'list', not a 'double'
--- failed re-building ‘dp.Rmd’

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

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

--- re-building ‘lol.Rmd’ using rmarkdown
Quitting from lines 31-42 (lol.Rmd) 
Error: processing vignette 'lol.Rmd' failed with diagnostics:
VECTOR_ELT() can only be applied to a 'list', not a 'double'
--- failed re-building ‘lol.Rmd’

--- re-building ‘lrcca.Rmd’ using rmarkdown
Quitting from lines 30-41 (lrcca.Rmd) 
Error: processing vignette 'lrcca.Rmd' failed with diagnostics:
VECTOR_ELT() can only be applied to a 'list', not a 'double'
--- failed re-building ‘lrcca.Rmd’

--- re-building ‘lrlda.Rmd’ using rmarkdown
Quitting from lines 31-42 (lrlda.Rmd) 
Error: processing vignette 'lrlda.Rmd' failed with diagnostics:
VECTOR_ELT() can only be applied to a 'list', not a 'double'
--- failed re-building ‘lrlda.Rmd’

--- re-building ‘mpls.Rmd’ using rmarkdown
Quitting from lines 31-42 (mpls.Rmd) 
Error: processing vignette 'mpls.Rmd' failed with diagnostics:
VECTOR_ELT() can only be applied to a 'list', not a 'double'
--- failed re-building ‘mpls.Rmd’

--- re-building ‘nearestCentroid.Rmd’ using rmarkdown
Quitting from lines 27-40 (nearestCentroid.Rmd) 
Error: processing vignette 'nearestCentroid.Rmd' failed with diagnostics:
VECTOR_ELT() can only be applied to a 'list', not a 'double'
--- failed re-building ‘nearestCentroid.Rmd’

--- re-building ‘opal.Rmd’ using rmarkdown
Quitting from lines 31-42 (opal.Rmd) 
Error: processing vignette 'opal.Rmd' failed with diagnostics:
VECTOR_ELT() can only be applied to a 'list', not a 'double'
--- failed re-building ‘opal.Rmd’

--- re-building ‘pca.Rmd’ using rmarkdown
Quitting from lines 31-42 (pca.Rmd) 
Error: processing vignette 'pca.Rmd' failed with diagnostics:
VECTOR_ELT() can only be applied to a 'list', not a 'double'
--- failed re-building ‘pca.Rmd’

--- re-building ‘pls.Rmd’ using rmarkdown
Quitting from lines 31-42 (pls.Rmd) 
Error: processing vignette 'pls.Rmd' failed with diagnostics:
VECTOR_ELT() can only be applied to a 'list', not a 'double'
--- failed re-building ‘pls.Rmd’

--- re-building ‘qoq.Rmd’ using rmarkdown
Quitting from lines 30-41 (qoq.Rmd) 
Error: processing vignette 'qoq.Rmd' failed with diagnostics:
VECTOR_ELT() can only be applied to a 'list', not a 'double'
--- failed re-building ‘qoq.Rmd’

--- re-building ‘rp.Rmd’ using rmarkdown
Quitting from lines 30-41 (rp.Rmd) 
Error: processing vignette 'rp.Rmd' failed with diagnostics:
VECTOR_ELT() can only be applied to a 'list', not a 'double'
--- failed re-building ‘rp.Rmd’

--- re-building ‘simulations.Rmd’ using rmarkdown
Quitting from lines 36-40 (simulations.Rmd) 
Error: processing vignette 'simulations.Rmd' failed with diagnostics:
VECTOR_ELT() can only be applied to a 'list', not a 'double'
--- failed re-building ‘simulations.Rmd’

--- re-building ‘xval.Rmd’ using rmarkdown
Quitting from lines 25-36 (xval.Rmd) 
Error: processing vignette 'xval.Rmd' failed with diagnostics:
VECTOR_ELT() can only be applied to a 'list', not a 'double'
--- failed re-building ‘xval.Rmd’

SUMMARY: processing the following files failed:
  ‘dp.Rmd’ ‘lol.Rmd’ ‘lrcca.Rmd’ ‘lrlda.Rmd’ ‘mpls.Rmd’
  ‘nearestCentroid.Rmd’ ‘opal.Rmd’ ‘pca.Rmd’ ‘pls.Rmd’ ‘qoq.Rmd’
  ‘rp.Rmd’ ‘simulations.Rmd’ ‘xval.Rmd’

Error: Vignette re-building failed.
Execution halted