| installed.packages {utils} | R Documentation |
Find (or retrieve) details of all packages installed in the specified libraries.
installed.packages(lib.loc = NULL, priority = NULL, noCache = FALSE)
lib.loc |
character vector describing the location of R library trees to search through. |
priority |
character vector or NULL (default). If non-null, used to
select packages; "high" is equivalent to
c("base", "recommended"). To select all packages without an
assigned priority use priority = "NA".
|
noCache |
Do not use cached information. |
installed.packages scans the ‘DESCRIPTION’ files of each
package found along lib.loc and returns a matrix of package
names, library paths and version numbers.
Note: this works with package names, not bundle names.
The information found is cached (by library) for the R session,
and updated only if the top-level library directory has been altered,
for example by installing or removing a package. If the cached
information becomes confused, it can be refreshed by running
installed.packages(noCache = TRUE).
A matrix with one row per package, row names the package names and
column names "Package", "LibPath", "Version",
"Priority", "Bundle", "Contains", "Depends",
"Suggests", "Imports" and "Built"
(the R version the package was built under).
update.packages, INSTALL, REMOVE.
str(ip <- installed.packages(priority = "high")) ip[, c(1,3:5)]