Method 2: Install All Packages in a Vector that are Not Already Installed The function returns an empty string, which tells us that the package called this_package (which doesn’t even exist) is not installed in our current environment. Now suppose we check if a package called this_package is installed: #check if this_package is installed Since ggplot2 is installed, the function simply returns the file path to where the package is installed. "C:/Users/bob/Documents/R/win-library/4.0/ggplot2" We can use the system.file() function to check if a particular package is installed in current R environment.įor example, we can use the following syntax to check if the package ggplot2 is installed in the current R environment: #check if ggplot2 is installed
Example 1: Check if Particular Package is Installed The following examples show how to use each method in practice. In this example, packages represents a vector of package names you’d like to have installed.
packages(setdiff(packages, rownames(installed. Method 2: Install All Packages in a Vector that are Not Already Installed install. Method 1: Check if Particular Package is Installed #check if ggplot2 is installed You can use the following methods to check if a package is installed in R:
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