# Wblcdf

## Definition:

$prob = wblcdf(x, a, b)$ computes the low tail Weibull cumulative distribution function for value $x$ using the parameters $a$ and $b$.

The low tail Weibull cumulative distribution function is defined by: $P(X

where $I_{(0,+\infty )}(x)$ is the interval on which the Weibull CDF is not zero.

## Parameters:

x (input, double)
the value of the $x$ variate.$x\geq 0$
a (input, double)
the scale parameter, $a$, of the required Weibull distribution, must be positive( $a>0$ ).
b (input, double)
the shape parameter, $b$, of the required Weibull distribution, must be positive ( $b>0$ ) .
prob (output, double)
the probability.