GNU Octave is a high-level language, primarily intended for numerical computations. It provides a convenient command line interface for solving linear and nonlinear problems numerically, and for performing other numerical experiments using a language that is mostly compatible with Matlab. It may also be used as a batch-oriented language.
安装， 因为正在使用ubuntu16.04作操作系统， 所以很自然的用命令安装了：
sudo apt update
sudo apt install octave
命令行安装后查看版本是4.0.0, 官网到2017-04-18时的已到4.2.1。也试过下载原码安装，没成功报错如下， 就没再去折腾了。先用用再说。
configure: error: A BLAS library was detected but found incompatible with your Fortran 77 compiler settings.