What Is a Q Meter?

Right-tailed function of standard normal distribution, also known as (standard normal distribution) complementary cumulative distribution function

Error function

Complementary error function

relationship

Matlab itself has a Q function, namely qfunc () ^[2]

Its inverse function is

qfuncinv ()

y = qfuncinv (x)

Returns the parameter of the q function whose value of the q function is x. The input x must be an array of real numbers containing elements between 0 and 1.

The following example illustrates the inverse relationship between qfunc and qfuncinv.

x1 = [0 1 2; 3 4 5];

y1 = qfuncinv (qfunc (x1))

x2 = 0: .2: 1;

y2 = qfunc (qfuncinv (x2))

The output is as follows:

y1 = 0 1 2 3 4 5

y2 = 0 0.2000 0.4000 0.6000 0.8000 1.0000