I believe this type of dependency belongs in the Suggests: field of the
DESCRIPTION file.
Lori Shepherd
Bioconductor Core Team
Roswell Park Cancer Institute
Department of Biostatistics & Bioinformatics
Elm & Carlton Streets
Buffalo, New York 14263
________________________________
From: Bioc-devel <bioc-devel-boun...@r-project.org> on behalf of Xu Ren
<xuren2...@gmail.com>
Sent: Tuesday, February 19, 2019 10:01:54 AM
To: bioc-devel@r-project.org
Subject: [Bioc-devel] Question about package dependency
Hi everyone,
I'm developing a Bioconductor package and I have a question about package
dependency. The functions in my package do not depend on ggplot2 but I used
ggplot2 to do some visualization in the package vignette. I'm wondering if
I should import ggplot2 in the DESCRIPTION file. If ggplot2 is not
imported, R CMD check will produce a note:
* checking tests ...
Running �testthat.R�
OK
* checking for unstated dependencies in vignettes ... NOTE
'library' or 'require' call not declared from: �ggplot2�
* checking package vignettes in �inst/doc� ... OK
* checking running R code from vignettes ...
If ggplot2 is imported, since it is used only in the vignette, and none of
the function in my package depend on ggplot2, R CMD check generates another
note:
* checking loading without being on the library search path ... OK
* checking dependencies in R code ... NOTE
Namespace in Imports field not imported from: �ggplot2�
All declared Imports should be used.
* checking S3 generic/method consistency ... OK
* checking replacement functions ... OK
So I'm wondering if ggplot2 should be imported in this case. Thank you!
Sincerely,
Xu Ren
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