gnuplot

安装 brew install gnuplot

官网 http://www.gnuplot.info/

绘制图形

首先输入：set term dumb
再次输入： 图形的命令，http://gnuplot.sourceforge.net/demo_5.0/simple.html

set term dumb
set key right nobox
set samples 100
plot [-pi/2:pi] cos(x),-(sin(x) > sin(x+1) ? sin(x) : sin(x+1))