MacOSXにgnuplotをインストールには

Hombebrewで簡単にインストールすることができる

## コマンドライン

```
brew install gnuplot
```

### 実行結果

```
[~]]$ brew install gnuplot
==> Installing dependencies for gnuplot: lua, readline, libpng, jpeg, libtiff, freetype, fontconfig, gd
==> Installing gnuplot dependency: lua
==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/lua-5.1.5.mavericks.bottle.tar.gz
######################################################################## 100.0%
==> Pouring lua-5.1.5.mavericks.bottle.tar.gz
🍺  /usr/local/Cellar/lua/5.1.5: 15 files, 276K
==> Installing gnuplot dependency: readline
==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/readline-6.3.6.mavericks.bottle.tar.gz
######################################################################## 100.0%
==> Pouring readline-6.3.6.mavericks.bottle.tar.gz
==> Caveats
This formula is keg-only, so it was not symlinked into /usr/local.

OS X provides the BSD libedit library, which shadows libreadline.
In order to prevent conflicts when programs look for libreadline we are
defaulting this GNU Readline installation to keg-only.

Generally there are no consequences of this for you. If you build your
own software and it requires this formula, you'll need to add to your
build variables:

    LDFLAGS:  -L/usr/local/opt/readline/lib
    CPPFLAGS: -I/usr/local/opt/readline/include

==> Summary
🍺  /usr/local/Cellar/readline/6.3.6: 40 files, 2.1M
==> Installing gnuplot dependency: libpng
==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/libpng-1.6.12.mavericks.bottle.tar.gz
######################################################################## 100.0%
==> Pouring libpng-1.6.12.mavericks.bottle.tar.gz
🍺  /usr/local/Cellar/libpng/1.6.12: 17 files, 1.2M
==> Installing gnuplot dependency: jpeg
==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/jpeg-8d.mavericks.bottle.2.tar.gz
######################################################################## 100.0%
==> Pouring jpeg-8d.mavericks.bottle.2.tar.gz
🍺  /usr/local/Cellar/jpeg/8d: 18 files, 780K
==> Installing gnuplot dependency: libtiff
==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/libtiff-4.0.3.mavericks.bottle.tar.gz
######################################################################## 100.0%
==> Pouring libtiff-4.0.3.mavericks.bottle.tar.gz
🍺  /usr/local/Cellar/libtiff/4.0.3: 254 files, 3.8M
==> Installing gnuplot dependency: freetype
==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/freetype-2.5.3_1.mavericks.bottle.1.tar.gz
######################################################################## 100.0%
==> Pouring freetype-2.5.3_1.mavericks.bottle.1.tar.gz
🍺  /usr/local/Cellar/freetype/2.5.3_1: 60 files, 2.5M
==> Installing gnuplot dependency: fontconfig
==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/fontconfig-2.11.1.mavericks.bottle.2.tar.gz
######################################################################## 100.0%
==> Pouring fontconfig-2.11.1.mavericks.bottle.2.tar.gz
==> /usr/local/Cellar/fontconfig/2.11.1/bin/fc-cache -frv
🍺  /usr/local/Cellar/fontconfig/2.11.1: 448 files, 3.6M
==> Installing gnuplot dependency: gd
==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/gd-2.1.0_2.mavericks.bottle.tar.gz
######################################################################## 100.0%
==> Pouring gd-2.1.0_2.mavericks.bottle.tar.gz
🍺  /usr/local/Cellar/gd/2.1.0_2: 33 files, 1.3M
==> Installing gnuplot
==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/gnuplot-4.6.5.mavericks.bottle.1.tar.gz
######################################################################## 100.0%
==> Pouring gnuplot-4.6.5.mavericks.bottle.1.tar.gz
🍺  /usr/local/Cellar/gnuplot/4.6.5: 45 files, 4.2M
[~]]$ 
```