- The sp package introduced a coherent set of classes and methods for handling spatial data in 2005. 3 The package remains the backbone of many packages that provide GIS capabilities in R. The sf package implements the simple features open standard for the representation of geographic vector data in R. The package first appeared on CRAN at the.
- The release of the leaflet package in 2015 revolutionized interactive web map creation from within R and a number of packages have built on these foundations adding new features (e.g., leaflet.extras) and making the creation of web maps as simple as creating static maps (e.g., mapview and tmap). This section illustrates each approach in the.
R uses a single package library for each installed version of R on your machine. Fortunately it is easy to modify the path where R installs your packages. To do this, you simply call the function.libPaths and specify the library location. Changing your library location. To change the library location, you use the function.libPaths. R packages are a collection of R functions, complied code and sample data. They are stored under a directory called 'library' in the R environment. By default, R installs a set of packages during installation. More packages are added later, when they are needed for some specific purpose. While installing packages, the packages are getting installed in AppData Local Temp location instead of library of R 3.3.0 and could not be loaded. Example: install.packages('devtools') There are binary versions available but the source versions are later: binary source needscompilation processx 2.0.0.1 3.3.1 TRUE callr 2.0.3 3.2.0 TRUE git2r 0.21.0 0.25.2 TRUE rcmdcheck 1.2.1 1.3.3.
Say you have an R script that you share with others. You may not be sure that each user has installed all the packages the script will require. Using
install.packages()
would be unnessary for users who already have the packages and simply need to load them.Here’s some code that provides an easy way to check whether specific packages are in the default Library. If they are, they’re simply loaded via
library()
. If any packages are missing, they’re installed (with dependencies) into the default Library and are then loaded.R Set Package Install Location
(This is a re-post of an entry that appeared on my old blog - see here).
Install | install & load packages
The logic of the
package.check()
function basically goes:- Using
lapply()
to the list ofpackages
- If a package is not installed, install it
- Otherwise, load it
R Change Location Of Packages
Since I already have all these packages installed, I see the following messages:
You can then use
search()
to determine whether all the packages haveloaded.R Package Directory
That’s all!
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