require 'nyaplot'

Nyaplot::Colors.lists

Nyaplot::Colors.Pastel2

Nyaplot::Colors.jet

Nyaplot::Colors.GnBu

Nyaplot::Colors.binary

Nyaplot::Colors.seq

Nyaplot::Colors.div

Nyaplot::Colors.qual

Nyaplot::Colors.seq(3)

Nyaplot::Colors.Spectral(11)

Nyaplot::Color.new(["#DEDEDE", "#ACACAC", "#1F141C", "#4A173D", "#8C547E"])

plot = Nyaplot::Plot.new
bar = plot.add(:bar, ['Persian', 'Maine Coon', 'American Shorthair'], [10,20,30])
plot.show

colors = Nyaplot::Colors.qual(3)

bar.color(colors)
plot.show

x=[]; y=[]; fill=[]
-5.step(5, 1) do |i|
  -5.step(5, 1) do |j|
    x.push(i)
    y.push(j)
    val = Math.sin(Math.sqrt(i*i+j*j))/Math.sqrt(i*i+j*j)
    fill.push((val.nan? ? 0 : val))
  end
end

plot2 = Nyaplot::Plot.new
hm = plot2.add(:heatmap, x, y, fill)
hm.width(1)
hm.height(1)
plot2.legend(true)
plot2.show

colors = Nyaplot::Colors.GnBu

hm.color(colors)
plot2.show