[ncl-install] testing NCL

[Ryan Pavlick]

Jerry,

Since you are using a Mac, you could try using homebrew to install ncl.

To use it, you first need to install homebrew by pasting the following line
in to your Terminal (more info at http://brew.sh):

ruby -e "$(curl -fsSL
https://raw.githubusercontent.com/Homebrew/install/master/install)"


Then, install caskroom (http://caskroom.io/), followed by ncl:

brew install caskroom/cask/brew-caskbrew cask install ncar-ncl

This will:
1) Download the appropriate NCL binary for your version of OS X from the
Earth System Grid
2) Check for homebrew dependencies, gcc and xquartz, and install them if
not found
3) Install ncl to /usr/local/ncl-6.3.0

A message will appear telling you exactly which lines to add your dotfiles,
including:
1) adding $NCARG_ROOT/bin to your $PATH
2) adding libgfortran.3.dylib to your $DYLD_FALLBACK_LIBRARY_PATH to fix
the libgomp issue

Cheers,
Ryan
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