lib unspecified & Error in loadNamespace

Question

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.

Answer 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"))