问题
I had everything working with R and RStudio, but then I moved the folders when cleaning up my computer directories & files. Now I\'m getting the error message below.
Should R and RStudio be installed under Program Files or Program Files (x86)? Should I have two libPaths?
install.packages(\"C:/Users/kevin/Downloads/fpp_0.5.zip\", repos = NULL)
## Warning in install.packages :
## package ‘C:/Users/kevin/Downloads/fpp_0.5.zip’
## is not available (for R version 3.0.0)
## Installing package into ‘C:/Users/kevin/Documents/R/win-library/3.0’
## (as ‘lib’ is unspecified)
## package ‘fpp’ successfully unpacked and MD5 sums checked
library(\"fpp\", lib.loc=\"C:/Users/kevin/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
回答1:
When 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 hence, R keeps throwing the load namespace error. Installing the package through, automatically installs all the dependencies and solves this problem.
install.packages("forecast",
repos = c("http://rstudio.org/_packages",
"http://cran.rstudio.com"))
回答2:
The last time I encountered a very similar problem, I used this code which I got somewhere:
install.packages("package's name", repos=c("http://rstudio.org/_packages", "http://cran.rstudio.com"))
simply put your package's name in the quotation marks.
Hope this helps.
回答3:
Use this:
install.packages("colorspace", dependencies = TRUE)
回答4:
I ran into this problem. It turned out that my .Rprofile had calls to a package that was not installed. Removing these lines allowed installation to proceed normally.
来源：https://stackoverflow.com/questions/16501507/lib-unspecified-error-in-loadnamespace