Error(s) in re-building vignettes:
  ...
--- re-building ‘vignette.Rmd’ using rmarkdown
Quitting from lines 30-50 (vignette.Rmd) 
Error: processing vignette 'vignette.Rmd' failed with diagnostics:
Any column of gamma must be a probability vector!!!
--- failed re-building ‘vignette.Rmd’

SUMMARY: processing the following file failed:
  ‘vignette.Rmd’

Error: Vignette re-building failed.
Execution halted