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function [y]=Q(x) % [y]=Q(x) % Q evaluates the Q-function. % y = 1/sqrt(2*pi) * integral from x to inf of exp(-t^2/2) dt. % y = (1/2) * erfc(x/sqrt(2)). y=(1/2)*erfc(x/sqrt(2));

function y=Q(x) % This program computes the right-tail probability % (Complementary cumulative distribution function) % for a N(0,1) random variable y= 0.5*erfc(x/sqrt(2));

q = quantizer('fixed', 'convergent', 'wrap', [3 2]); x = (-2:eps(q)/4:2)'; y = quantize(q,[3 6 -2 -7 4 ])

q = quantizer('fixed', 'convergent', 'wrap', [3 2]); x = (-2:eps(q)/4:2)' y = quantize(q,x)

DDS AD9959应用电路和配置源程序-电子电路图,电子技术

function x = inv_q(y) % Inverse of Q-function % y = Q(x) --> x = inv_Q(y) x = sqrt(2.0) * inv_erfc(2.0 * y); return;

#!/bin/bash # Douglas Hofstadter's notorious "Q-series": # Q(1) = Q(2) = 1 # Q(n) = Q(n - Q(n-1)) + Q(n - Q(n-2)), for n>2 # This is a "chaotic" integer series with strange #+ and unpredictable