Error in re-building vignettes:
  ...
Warning in block_exec(params) :
  failed to tidy R code in chunk <unnamed-chunk-2>
reason: Error in loadNamespace(name) : there is no package called 'formatR'

Loading required package: Hmisc
Loading required package: lattice
Loading required package: survival
Loading required package: Formula
Loading required package: ggplot2

Attaching package: 'Hmisc'

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

    format.pval, units

Loading required package: gdata
gdata: read.xls support for 'XLS' (Excel 97-2004) files ENABLED.

gdata: read.xls support for 'XLSX' (Excel 2007+) files ENABLED.

Attaching package: 'gdata'

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

    nobs

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

    object.size

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

    startsWith

Loading required package: xtable

Attaching package: 'xtable'

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

    label, label<-

Loading required package: SNPassoc
Loading required package: haplo.stats
Loading required package: mvtnorm
Loading required package: parallel
Warning in block_exec(params) :
  failed to tidy R code in chunk <unnamed-chunk-3>
reason: Error in loadNamespace(name) : there is no package called 'formatR'

Warning in block_exec(params) :
  failed to tidy R code in chunk <unnamed-chunk-5>
reason: Error in loadNamespace(name) : there is no package called 'formatR'

Warning in block_exec(params) :
  failed to tidy R code in chunk <unnamed-chunk-6>
reason: Error in loadNamespace(name) : there is no package called 'formatR'

Warning in block_exec(params) :
  failed to tidy R code in chunk <unnamed-chunk-7>
reason: Error in loadNamespace(name) : there is no package called 'formatR'

Warning in block_exec(params) :
  failed to tidy R code in chunk <unnamed-chunk-8>
reason: Error in loadNamespace(name) : there is no package called 'formatR'

Warning in block_exec(params) :
  failed to tidy R code in chunk <unnamed-chunk-9>
reason: Error in loadNamespace(name) : there is no package called 'formatR'

Warning in block_exec(params) :
  failed to tidy R code in chunk <unnamed-chunk-10>
reason: Error in loadNamespace(name) : there is no package called 'formatR'

Warning in block_exec(params) :
  failed to tidy R code in chunk <unnamed-chunk-11>
reason: Error in loadNamespace(name) : there is no package called 'formatR'

Warning in block_exec(params) :
  failed to tidy R code in chunk <unnamed-chunk-12>
reason: Error in loadNamespace(name) : there is no package called 'formatR'

Warning in block_exec(params) :
  failed to tidy R code in chunk <unnamed-chunk-13>
reason: Error in loadNamespace(name) : there is no package called 'formatR'

Warning in cor.test.default(x, as.integer(y), method = "spearman") :
  Cannot compute exact p-value with ties
Warning in block_exec(params) :
  failed to tidy R code in chunk <unnamed-chunk-14>
reason: Error in loadNamespace(name) : there is no package called 'formatR'

Warning in cor.test.default(x, as.integer(y), method = "spearman") :
  Cannot compute exact p-value with ties
Warning in block_exec(params) :
  failed to tidy R code in chunk <unnamed-chunk-15>
reason: Error in loadNamespace(name) : there is no package called 'formatR'

Quitting from lines 307-311 (compareGroups_vignette.Rmd) 
Error: processing vignette 'compareGroups_vignette.Rmd' failed with diagnostics:
`x` must be a numeric or a character vector
Execution halted