check-vector-isInstalled | R Documentation |
Is the package installed?
isInstalled(x, lib = NULL)
allAreInstalled(x, lib = NULL)
x |
Object. |
lib |
|
TRUE
on success;
FALSE
on failure, with cause set.
isInstalled()
: Vectorized.
allAreInstalled()
: Scalar.
Updated 2023-09-29.
## TRUE ====
isInstalled(c("base", "utils"))
## FALSE ====
isInstalled(c("AAA", "BBB"))
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