Created
February 22, 2019 02:10
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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.empty?) | |
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 avg(l) | |
l.inject { |t, x| t + x }.to_f / l.size | |
end | |
def seq(n) | |
n1 = n | |
l = [n1] | |
while (n != 1) | |
n = f2(n) | |
l << n | |
end | |
return l | |
end | |
j = 100 | |
d1 = 0.64 | |
(0..10).each \ | |
{ | |
|x| | |
w = j + x * 25 | |
200.times \ | |
{ | |
d = d1 + rand() * (1.0 - d1) | |
n = terras121(dense(w, d)) | |
l = seq(n) | |
a = avg(l[0...j].map { |x| d(x.to_s(2)) }) | |
b = avg(l[j...2 * j].map { |x| d(x.to_s(2)) }) | |
ba = b - a | |
puts([x + d, ba, ba < 0 ? 2 : 1].join("\t")) | |
} | |
} |
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