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qfunc - Q function

Syntax

y = qfunc(x)

Description

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

Examples

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

See Also

qfuncinv, erf, erfc, erfcx, erfinv, erfcinv

qammod

qfuncinv

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