在R 3.4中安裝samr

Question

我在R v3.4 MacOS sierra中安裝samr軟件包時遇到問題。我收到此警告消息：

"Package which is only available in source form, and may need compilation of 
    C/C++/Fortran: ‘samr’ 
Do you want to attempt to install these from sources? 
y/n: y 
installing the source package ‘samr’ 

trying URL 'https://cran.rstudio.com/src/contrib/samr_2.0.tar.gz' 
Content type 'application/x-gzip' length 36702 bytes (35 KB) 
================================================== 
downloaded 35 KB 

* installing *source* package ‘samr’ ... 
** libs 
gfortran -fPIC -g -O2 -c rankcol.f -o rankcol.o 
make: gfortran: No such file or directory 
make: *** [rankcol.o] Error 1 
ERROR: compilation failed for package ‘samr’ 
* removing ‘/Library/Frameworks/R.framework/Versions/3.4/Resources/library/samr’ 
Warning in install.packages : 
    installation of package ‘samr’ had non-zero exit status 

有沒有人有辦法解決這個問題？

Answer 1

非常感謝，我dwonloaded gofortran適用於MacOS塞拉利昂https://gcc.gnu.org/wiki/GFortranBinaries#MacOS，似乎現在的工作