[問題類型]:
效能諮詢(我想讓R 跑更快)
[軟體熟悉度]:
入門(寫過其他程式，只是對語法不熟悉)
[問題敘述]:安裝Rmpi (Mac OSX 10.9)
[程式範例]:
我基本上follow下面這個網址的說明安裝Rmpi：
http://tinyurl.com/kh28mjk
其中第一部有說到要安裝Xcode跟homebrew，
所以我又根據下面這個網址的指示安裝：
http://tinyurl.com/8lqpohx
Xcode我之前就有裝，
我忘了之前有裝過homebrew，
所以裝homebrew的時候終端機console顯示
It appears Homebrew is already installed. If your intent is to reinstall
you should do the following before running this installer again:
rm -rf /usr/local/Cellar /usr/local/.git && brew cleanup
所以我就照做了，
重新安裝也很順利，
但執行brew doctor時出現一堆Warning:
Warning: Some directories in /usr/local/share/man aren't writable.
This can happen if you "sudo make install" software that isn't managed
by Homebrew. If a brew tries to add locale information to one of these
directories, then the install will fail during the link step.
You should probably `chown` them:
/usr/local/share/man/mann
Warning: Broken symlinks were found. Remove them with `brew prune`:
/usr/local/bin/gitk
/usr/local/bin/git-upload-pack
/usr/local/bin/git-upload-archive
/usr/local/bin/git-subtree
/usr/local/bin/git-shell
/usr/local/bin/git-remote-hg
/usr/local/bin/git-remote-bzr
/usr/local/bin/git-receive-pack
/usr/local/bin/git-cvsserver
/usr/local/bin/git-credential-osxkeychain
/usr/local/bin/git
/usr/local/etc/bash_completion.d/git-prompt.sh
/usr/local/etc/bash_completion.d/git-completion.bash
/usr/local/lib/perl5/site_perl/Git.pm
/usr/local/lib/perl5/site_perl/Git/SVN.pm
/usr/local/lib/perl5/site_perl/Git/SVN/Utils.pm
/usr/local/lib/perl5/site_perl/Git/SVN/Ra.pm
/usr/local/lib/perl5/site_perl/Git/SVN/Prompt.pm
/usr/local/lib/perl5/site_perl/Git/SVN/Migration.pm
/usr/local/lib/perl5/site_perl/Git/SVN/Memoize/YAML.pm
/usr/local/lib/perl5/site_perl/Git/SVN/Log.pm
/usr/local/lib/perl5/site_perl/Git/SVN/GlobSpec.pm
/usr/local/lib/perl5/site_perl/Git/SVN/Fetcher.pm
/usr/local/lib/perl5/site_perl/Git/SVN/Editor.pm
/usr/local/lib/perl5/site_perl/Git/IndexInfo.pm
/usr/local/lib/perl5/site_perl/Git/I18N.pm
/usr/local/lib/perl5/site_perl/5.16.2/darwin-thread-multi-2level/auto/Git/.packlist
/usr/local/share/zsh/site-functions/git-completion.bash
/usr/local/share/zsh/site-functions/_git
/usr/local/share/man/man7/gitworkflows.7
/usr/local/share/man/man7/gittutorial.7
/usr/local/share/man/man7/gittutorial-2.7
/usr/local/share/man/man7/gitrevisions.7
/usr/local/share/man/man7/gitnamespaces.7
/usr/local/share/man/man7/gitglossary.7
/usr/local/share/man/man7/gitdiffcore.7
/usr/local/share/man/man7/gitcvs-migration.7
/usr/local/share/man/man7/gitcredentials.7
/usr/local/share/man/man7/gitcore-tutorial.7
/usr/local/share/man/man7/gitcli.7
/usr/local/share/man/man5/gitweb.conf.5
/usr/local/share/man/man5/gitrepository-layout.5
/usr/local/share/man/man5/gitmodules.5
/usr/local/share/man/man5/gitignore.5
/usr/local/share/man/man5/githooks.5
/usr/local/share/man/man5/gitattributes.5
/usr/local/share/man/man3/Git::SVN::Utils.3pm
/usr/local/share/man/man3/Git::SVN::Ra.3pm
/usr/local/share/man/man3/Git::SVN::Prompt.3pm
/usr/local/share/man/man3/Git::SVN::Memoize::YAML.3pm
/usr/local/share/man/man3/Git::SVN::Fetcher.3pm
/usr/local/share/man/man3/Git::SVN::Editor.3pm
/usr/local/share/man/man3/Git::I18N.3pm
/usr/local/share/man/man3/Git.3pm
/usr/local/share/man/man1/gitweb.1
/usr/local/share/man/man1/gitremote-helpers.1
/usr/local/share/man/man1/gitk.1
/usr/local/share/man/man1/git.1
/usr/local/share/man/man1/git-write-tree.1
/usr/local/share/man/man1/git-whatchanged.1
/usr/local/share/man/man1/git-web