Error(s) in re-building vignettes:
--- re-building ‘Categorical-and-continuous-features.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: 'igraph'

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

    decompose, spectrum

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

    union


Attaching package: 'dplyr'

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

    as_data_frame, groups, union

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

    filter, lag

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

    intersect, setdiff, setequal, union

Loading required package: ggplot2
Using `stress` as default layout
Quitting from lines 31-35 (Categorical-and-continuous-features.Rmd) 
Error: processing vignette 'Categorical-and-continuous-features.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘Categorical-and-continuous-features.Rmd’

--- re-building ‘separate-peels-quintet.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


Attaching package: 'igraph'

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

    compose, simplify

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

    crossing

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

    as_data_frame, groups, union

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

    decompose, spectrum

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

    union

Using `stress` as default layout
Quitting from lines 45-74 (separate-peels-quintet.Rmd) 
Error: processing vignette 'separate-peels-quintet.Rmd' failed with diagnostics:
polygon edge not found
--- failed re-building ‘separate-peels-quintet.Rmd’

SUMMARY: processing the following files failed:
  ‘Categorical-and-continuous-features.Rmd’
  ‘separate-peels-quintet.Rmd’

Error: Vignette re-building failed.
Execution halted