puts 'Hello, world!' \$stderr.puts 'Error!' Math.sqrt(2) File.open('IRuby Examples/ruby.svg') File.open('IRuby Examples/ruby.png') IRuby.display 'Hello, world!', mime: 'text/html' IRuby.html '' IRuby.display IRuby.latex <<-'TEX' \begin{eqnarray} \nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} & = \frac{4\pi}{c}\vec{\mathbf{j}} \\ \nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\ \nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\ \nabla \cdot \vec{\mathbf{B}} & = 0 \end{eqnarray} TEX IRuby.math('F(k) = \int_{-\infty}^{\infty} f(x) e^{2\pi i k} dx') IRuby.display IRuby.table([1,2,[],3]) IRuby.display IRuby.table({a:1,b:2,c:3}) IRuby.display IRuby.table([[11,12,13,14],[21,22,23],'not an Array',[31,32,33,34]]) IRuby.display IRuby.table({a:[11,12,13,14],b:[21,22,23],c:[31,32,33,34]}) IRuby.display IRuby.table([{a:1,b:2,c:3},'not an Array',{a:2,b:3,c:4,e:5}]) IRuby.display IRuby.table([{a:1,b:2,c:3},{a:2,b:3,c:4,d:5},{0=>:x,1=>:y},[:a,:b,:c]]) ls Array require 'gnuplot' Gnuplot::Plot.new do |plot| plot.xrange '[-0.5:0.5]' plot.title 'Example plot' plot.ylabel 'x' plot.xlabel 'sin(1/x)' plot.samples 10000 plot.data << Gnuplot::DataSet.new('sin(1/x)') do |ds| ds.with = 'lines' ds.linewidth = 2 end end Gnuplot::SPlot.new do |plot| plot.title 'Spiral' plot.nokey plot.parametric plot.hidden3d plot.view '80,50' plot.isosamples '60,15' plot.xrange '[-8:8]' plot.yrange '[-8:8]' plot.zrange '[-8:8]' plot.urange '[-2*pi:2*pi]' plot.vrange '[-pi:pi]' plot.data << Gnuplot::DataSet.new('cos(u)*(cos(v)+3), sin(u)*(cos(v)+3), sin(v)+u') do |ds| ds.with = 'lines' end end require 'rubyvis' Rubyvis::Panel.new do width 150 height 150 bar do data [1, 1.2, 1.7, 1.5, 0.7, 0.3] width 20 height {|d| d * 80} bottom(0) left {index * 25} end end require 'matrix' Matrix[[1,2,3],[1,2,3]] require 'nyaplot' x = []; y = []; theta = 0.6; a=1 while theta < 14*Math::PI do x.push(a*Math::cos(theta)/theta) y.push(a*Math::sin(theta)/theta) theta += 0.1 end plot1 = Nyaplot::Plot.new plot1.add(:line, x, y) plot1.show