mt_tsukuba.png

mt_tsukuba.rb

# -*- coding: utf-8 -*-
# Mt. Tsukuba drawn using Ruby/Numo::Gnuplot
require "numo/gnuplot"

Numo.gnuplot do
  set term: ["png", size:[700,350]]
  set output: "mt_tsukuba.png"
  set size: {ratio:-1}
  set xrange: -2000..3000
  set yrange: 0..1600
  set title:["謹賀新年　２０１７", font:"/usr/share/fonts/ipa-pmincho/ipamp.ttf,20"]

  set object:[1, circle: {at:[2150,750], size:250, fc:{rgb:"red"}, fs:{solid:1}}]
  plot "(1-abs(1-exp(-((x/877)**2)/2)/0.9))*877", with:{filledcurve:"x1", lc:{rgb:"dark-green"}}
end

Ruby/Numo::Gnuplot で描く 筑波山と日の出。