Top Level Namespace

Defined Under Namespace

Classes: Phylip

Instance Method Summary collapse

Instance Method Details

#fisher_yates_shuffle(a) ⇒ Object 



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# File 'lib/rphylip.rb', line 2

def fisher_yates_shuffle(a)
    (a.size-1).downto(1) do |i|
      j = rand(i+1)
      a[i], a[j] = a[j], a[i] if i != j
    end
end

#pseudonormal(x, y) ⇒ Object 



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# File 'lib/rphylip.rb', line 8

def pseudonormal(x,y)
    num = 0
    reps = 4
    reps.times do
     num += rand(y - x + 1) + x
    end
    num / reps
end