Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
def f2(n)
return n.odd? ? (n * 3 + 1) / 2 : n / 2
end
def adj(x, m, n, s2, p2, p, x3)
s2.replace(p[0...x] + (x3 % 2).to_s)
m = (s2[x, 1] == p[x, 1])
n = p2.reverse.to_i(2)
p2[x, 1] = m ? '11' : '01'
return m, n, x3
end
def terras121(p)
p2 = ['01', '11'][p[0, 1].to_i]
n = 1
n3 = 0
m = p2 == '11'
x3 = (p2.reverse.to_i(2)) >> 1
(1...p.length).each \
{
|x|
if (!m)
ns = n.to_s(2)
ns[0, 1] = ''
m1 = x3 - 3**n3
n1 = f2(m1)
end
n3 = p[0...x].split('').select { |z| z == '1' }.size
s2 = ''
m, n, x3 = adj(x, m, n, s2, p2, p, m ? (f2(x3) + 3**n3) : (n1 + 3**n3))
}
n = p2.reverse.to_i(2)
return n
end
def dense(w, d)
w2 = w - 1
a = (0...w2).to_a
s = '0' * w2
(1..(d * w - 1)).map { a.delete_at(rand(a.size)) }.each { |x| s[x, 1] = '1' }
return ('1' + s)
end
def d(s)
c = s.split('').select { |x| x == '1' }.size
d = c.to_f / s.length
return d
end
def len(ns, p)
l = ns.split(p)
l = [] if (l.nil?)
l.shift if (l[0] == '')
return l.map { |x| x.length }
end
def len01(ns)
return len(ns, /0+/), len(ns, /1+/)
end
def e(ns)
return len01(ns).flatten.size.to_f / ns.length
end
def stat(l)
t = l.inject { |a, x| a + x }
t2 = l.inject { |a, x| a + x ** 2 }
c = l.size
a = t.to_f / c
z = t2.to_f / c - a ** 2
sd = Math.sqrt(z < 0 ? 0 : z)
raise if (sd.nan?)
return a, sd, l.max
end
def seq(n)
n1 = n
l = [n1]
while (n != 1)
n = f2(n)
l << n
end
cg = l.index { |x| x < n1 }
cg = 0 if (cg.nil?)
cm = (0..cg).max_by { |x| l[x] }
cm1 = (0...l.size).max_by { |x| l[x] }
cg1 = l.rindex { |x| x >= n1 }
return {'cm1' => cm1, 'cm' => cm, 'cg1' => cg1, 'cg' => cg, 'c' => l.size}
end
def gp(l)
f = File.open('gnuplot.cmd', 'w')
f.puts('$dat << eof')
k = l[0].keys
f.puts(k.join("\t"))
l.each { |x| f.puts(x.values.join("\t")) }
f.puts('eof')
f.puts('set key top left; set colors classic; plot \\')
(k - ['d1']).each \
{
|x|
m = ''
m = 'lw 2' if (x[-1, 1] == '1')
m += ' dt 3' if (['cm', 'cg'].member?(x))
f.puts("$dat using (column('d1')):(column('#{x}')) title '#{x}' with line #{m},\\")
}
f.close
end
l = []
c = 400
c.times \
{
|x|
n = terras121(dense(200, d1 = x.to_f / (c - 1)))
l << seq(n).merge({'d1' => d1})
}
gp(l)
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.