Errors installing 'forecast' package in R version 3.3.2 - r

Question

Trying to install 'forecast' package in R version 3.3.2 on MacOS Sierra as follows:
install.packages("forecast")
Getting a slew of errors I don't understand. First it downloads all dependency packages from http://cloud.r-project.org. First error I get is this:
* installing *source* package ‘quadprog’ ...
** package ‘quadprog’ successfully unpacked and MD5 sums checked
** libs
gfortran -arch x86_64 -fPIC -g -O2 -c aind.f -o aind.o
make: gfortran: No such file or directory
make: *** [aind.o] Error 1
ERROR: compilation failed for package ‘quadprog’
* removing ‘/Users/ekorne201/Library/R/3.3/library/quadprog’
It then moves on to:
* installing *source* package ‘fracdiff’ ...
** package ‘fracdiff’ successfully unpacked and MD5 sums checked
After which it says:
ld: warning: directory not found for option '-L/Users/Shared/Jenkins/workspace/External-R-3.3.2/vendor/build/lib'
ld: warning: directory not found for option '-L/usr/local/lib/gcc/i686-apple-darwin8/4.2.3/x86_64'
ld: warning: directory not found for option '-L/usr/local/lib/x86_64'
ld: warning: directory not found for option '-L/usr/local/lib/gcc/i686-apple-darwin8/4.2.3'
ld: library not found for -lgfortran
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [fracdiff.so] Error 1
ERROR: compilation failed for package ‘fracdiff’
* removing ‘/Users/ekorne201/Library/R/3.3/library/fracdiff’
Goes through the same thing for 'lmtest' and 'RcppArmadillo', after which it ends with:
ERROR: dependencies ‘tseries’, ‘fracdiff’, ‘lmtest’, ‘RcppArmadillo’ are not available for package ‘forecast’
* removing ‘/Users/ekorne201/Library/R/3.3/library/forecast’
The downloaded source packages are in
‘/private/var/folders/8p/54qnlb9x7bj8syz631_d58t92rmkyp/T/Rtmp246ipQ/downloaded_packages’
Warning messages:
1: In install.packages("forecast") :
installation of package ‘quadprog’ had non-zero exit status
2: In install.packages("forecast") :
installation of package ‘fracdiff’ had non-zero exit status
3: In install.packages("forecast") :
installation of package ‘lmtest’ had non-zero exit status
4: In install.packages("forecast") :
installation of package ‘RcppArmadillo’ had non-zero exit status
5: In install.packages("forecast") :
installation of package ‘tseries’ had non-zero exit status
6: In install.packages("forecast") :
installation of package ‘forecast’ had non-zero exit status
Stuck on how to proceed and would appreciate the advice.

Answer 1

I got the same error. I solved it by installing the gfortran. In macOS, I can do it such that
brew install gcc
and in R such that
install.packages("forecast")
so
> library(forecast); fit <- tbats(UScitiesD);
> fit
BATS(0.566, {0,2}, -, -)
Call: tbats(y = UScitiesD)
Parameters
Lambda: 0.565592
Alpha: 0.2166945
MA coefficients: -0.130506 -0.511551
Seed States:
[,1]
[1,] 90.10291
[2,] 0.00000
[3,] 0.00000
Sigma: 27.61468
AIC: 761.9238
As mentioned in comments, other method is to install it from here.
Related
Does installing gfortran with homebrew and with an installer create a conflict?