Error(s) in re-building vignettes:
--- re-building ‘perc_calculator_example.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.

Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union


Please cite as: 

Cimentada, (2019). perccalc: An R package for estimating percentiles from categorical variables. Journal of Open Source Software, 4(44), 1796, https://doi.org/10.21105/joss.01796
Quitting from lines 198-205 (perc_calculator_example.Rmd) 
Error: processing vignette 'perc_calculator_example.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘perc_calculator_example.Rmd’

--- re-building ‘perc_warning_example.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.

Please cite as: 

Cimentada, (2019). perccalc: An R package for estimating percentiles from categorical variables. Journal of Open Source Software, 4(44), 1796, https://doi.org/10.21105/joss.01796

Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

--- finished re-building ‘perc_warning_example.Rmd’

--- re-building ‘pisa_example.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) not available. Falling back to R Markdown v1.

Please cite as: 

Cimentada, (2019). perccalc: An R package for estimating percentiles from categorical variables. Journal of Open Source Software, 4(44), 1796, https://doi.org/10.21105/joss.01796

Attaching package: 'dplyr'

The following objects are masked from 'package:stats':

    filter, lag

The following objects are masked from 'package:base':

    intersect, setdiff, setequal, union

Quitting from lines 87-94 (pisa_example.Rmd) 
Error: processing vignette 'pisa_example.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘pisa_example.Rmd’

SUMMARY: processing the following files failed:
  ‘perc_calculator_example.Rmd’ ‘pisa_example.Rmd’

Error: Vignette re-building failed.
Execution halted