To cite package ‘xray’ in publications use:

Seibelt P (2017). xray: X Ray Vision on your Datasets. R package version 0.2.900, https://github.com/sicarul/xray.

Corresponding BibTeX entry:

  @Manual{,
    title = {xray: X Ray Vision on your Datasets},
    author = {Pablo Seibelt},
    year = {2017},
    note = {R package version 0.2.900},
    url = {https://github.com/sicarul/xray},
  }