#> Use requireNamespace("dplyr", quietly = TRUE) to test if package is
#> installed, then use dplyr::fun() to refer to functions.
4.1.1
バージン
特定のバージョンのパッケージに依存している場合は、パッケージ名の後に括弧書きでそのバー
ジョンを指定します。
Imports:
ggvis (>= 0.2),
dplyr (>= 0.3.0.1)
Suggests:
MASS (>= 7.3.0)
ほとんどの場合は、特定のバージョン(
MASS (== 7.3.0)
)を指定するよりも、最小限のバー
ジョンを指定したいでしょう。なぜなら、
R
は同じパッケージの複数のバージョンを同時に持つこ
とができないので、特定のバージョンへの依存を指定すると、劇的に問題が発生しやすくなりま
す。
パッケージをリリースする場合は、バージョン管理は最も重要です。未知のユーザとあなたが全 ...
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