| Communications Toolbox | |
Q function
y = qfunc(x)
y = qfunc(x) is one minus the cumulative distribution function of the standardized normal random variable, evaluated at each element of the real array x. For a scalar x, the formula is
The Q function is related to the complementary error function, erfc, according to
The example below computes the Q function on a matrix, element by element.
x = [0 1 2; 3 4 5]; format short e % Switch to floating point format for displays. y = qfunc(x) format % Return to default format for displays.
The output is below.
y = 5.0000e-001 1.5866e-001 2.2750e-002 1.3499e-003 3.1671e-005 2.8665e-007
qfuncinv, erf, erfc, erfcx, erfinv, erfcinv
| | qammod | qfuncinv | |
© 1994-2005 The MathWorks, Inc.