Error(s) in re-building vignettes:
--- re-building ‘multivariate_irregular.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.

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 ‘multivariate_irregular.Rmd’

--- re-building ‘univariate_gridded.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.

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 88-105 (univariate_gridded.Rmd) 
Error: processing vignette 'univariate_gridded.Rmd' failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building ‘univariate_gridded.Rmd’

--- re-building ‘univariate_irregular.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.

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

Joining, by = c("Var1", "Var2")
--- finished re-building ‘univariate_irregular.Rmd’

--- re-building ‘univariate_irregular_poisson.Rmd’ using rmarkdown
Pandoc is required to build R Markdown vignettes but not available. Please make sure it is installed.

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 87-105 (univariate_irregular_poisson.Rmd) 
Error: processing vignette 'univariate_irregular_poisson.Rmd' failed with diagnostics:
attempt to use zero-length variable name
--- failed re-building ‘univariate_irregular_poisson.Rmd’

SUMMARY: processing the following files failed:
  ‘univariate_gridded.Rmd’ ‘univariate_irregular_poisson.Rmd’

Error: Vignette re-building failed.
Execution halted