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I have successfully installed the tm package, which is located in: C:\Users\JustinLiang\Documents\R\win-library\3.0
After type library(), it shows me the R packages available list:
Packages in library ‘C:/Users/JustinLiang/Documents/R/win-library/3.0’:
tm Text Mining Package
Packages in library ‘C:/Program Files/R/R-3.0.2/library’:
however, when I try to load the package: library(tm), it shows me an error:
Error in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]) :
there is no package called ‘slam’
Error: package or namespace load failed for ‘tm’
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There are basically two extremely important functions when it comes down to R packages: install. packages() , which as you can expect, installs a given package. library() which loads packages, i.e. attaches them to the search list on your R workspace.
library(MASS) Another way to load a package is to simply check the box next to the package name in the Packages panel in RStudio. When you use this method, you will notice that RStudio enters the Library( ) command in the Command console when you check the package box.
The package has to be first installed before you load the package using library(). To install any package, open the R or RStudio shell and execute the following
install.packages("tm",dependencies=TRUE)
This will ask you to select the mirror and it will install it for you. If you use RStudio, you can easily do it from the Tools menu as shown below (Tools -> Install Packages -> Name of the package you want to install).
And then finally, you can invoke the library("name of the package installed") function.
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