Maintainer: ‘Xiaorui (Jeremy) Zhu <zhuxiaorui1989@gmail.com>’

The URL field contains the following bad parts:
  GitHub:
The URL field should be a list of URLs separated by commas or
whitespace.
Found the following Rd file(s) with Rd \link{} targets missing package
anchors:
  plot.Rd: ggplot2
Please provide package anchors for all Rd \link{} targets not in the
package itself and the base packages.
Maintainer: ‘Xiaorui (Jeremy) Zhu <zhuxiaorui1989@gmail.com>’

The URL field contains the following bad parts:
  GitHub:
The URL field should be a list of URLs separated by commas or
whitespace.
Found the following Rd file(s) with Rd \link{} targets missing package
anchors:
  plot.Rd: ggplot2
Please provide package anchors for all Rd \link{} targets not in the
package itself and the base packages.
Found the following Rd file(s) with Rd \link{} targets missing package
anchors:
  plot.Rd: ggplot2
Please provide package anchors for all Rd \link{} targets not in the
package itself and the base packages.
Found the following Rd file(s) with Rd \link{} targets missing package
anchors:
  plot.Rd: ggplot2
Please provide package anchors for all Rd \link{} targets not in the
package itself and the base packages.
Found the following Rd file(s) with Rd \link{} targets missing package
anchors:
  plot.Rd: ggplot2
Please provide package anchors for all Rd \link{} targets not in the
package itself and the base packages.
Found the following Rd file(s) with Rd \link{} targets missing package
anchors:
  plot.Rd: ggplot2
Please provide package anchors for all Rd \link{} targets not in the
package itself and the base packages.

Maintainer: ‘Jean-Sebastien Pierre <jean-sebastien.pierre@univ-rennes1.fr>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: person(given = "Jean-Sebastien",
                    family = "Pierre",
                    role = c("aut", "cre"),
                    email = "jean-sebastien.pierre@univ-rennes1.fr")
as necessary.

The URL field contains the following bad parts:
  none
The URL field should be a list of URLs separated by commas or
whitespace.
Maintainer: ‘Jean-Sebastien Pierre <jean-sebastien.pierre@univ-rennes1.fr>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: person(given = "Jean-Sebastien",
                    family = "Pierre",
                    role = c("aut", "cre"),
                    email = "jean-sebastien.pierre@univ-rennes1.fr")
as necessary.

The URL field contains the following bad parts:
  none
The URL field should be a list of URLs separated by commas or
whitespace.