Error in loadnamespace(j <- i[[1l]], c(lib.loc, .libpaths()), versioncheck = vi[[j]]) :

Question

Problem :

My R and RStudio were working perfectly fine till I moved the folders while cleaning up my directories & files and now I am facing the following error message :

Should I reinstall the R and RStudio under the Program Files or Program Files (x86)? Also is it good practice to have two libPaths?

install.packages("C:/Users/alecxe/Downloads/fpp_0.5.zip", repos = NULL)

## Warning in install.packages :

## package ‘C:/Users/alecxe/Downloads/fpp_0.5.zip’

## is not available (for R version 3.0.0)

## Installing package into ‘C:/Users/alecxe/Documents/R/win-library/3.0’

## (as ‘lib’ is unspecified)

## package ‘fpp’ successfully unpacked and MD5 sums checked

library("fpp", lib.loc="C:/Users/alecxe/Documents/R/win-library/3.0")

Loading required package: forecast

## Error in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]) : 

## there is no package called ‘colorspace’

## Error: package ‘forecast’ could not be loaded

Answer 1

Generally when you try to install the package using the RStudio package installer or directly from CRAN, it will not install the following dependencies "fracdiff", "Rcpp", "RcppArmadillo" and "colorspace" and so the R keeps showing the load namespace error. So to avoid this error you should install the package through, automatically installs all your dependencies and solves this issue.

install.packages("forecast",repos = c("http://rstudio.org/_packages",

 "http://cran.rstudio.com"))

OR

Use following command to resolve the issue::

install.packages("colorspace", dependencies = TRUE)

Answer 2

At the time you install the package using the RStudio package installer or directly from CRAN, it doesn't install the dependencies ("fracdiff", "Rcpp", "RcppArmadillo" and "colorspace") and therefore, R keeps throwing the load namespace error. Installing the package through, automatically installs all the dependencies and solves this issue.

install.packages("forecast",
                 repos = c("http://rstudio.org/_packages",
                           "http://cran.rstudio.com"))

The last time I encountered a very similar issue, using this code : install.packages("package's name", repos=c("http://rstudio.org/_packages", "http://cran.rstudio.com"))

Use this:

install.packages("colorspace", dependencies = TRUE)

Important Note:

 There is to first install ggplot2 explicitly installing all dependencies

install.packages(
   "ggplot2",
   repos = c("http://rstudio.org/_packages",
   "http://cran.rstudio.com")
)
#> You may also find it useful to restart R,
#> In RStudio, that's the menu Session >> Restart R

library(ggplot2)