CDFPLOT Statement

Overview

The CDFPLOT statement plots the observed cumulative distribution function (cdf) of a variable, defined as

$F_{N}(x) & = & {percent of nonmissing values} \leq x \ & = & \frac{{number of values} \leq x}N x 100\% \$

where N is the number of nonmissing observations. The cdf is an increasing step function that has a vertical jump of [1/N] at each value of x equal to an observed value. The cdf is also referred to as the empirical cumulative distribution function (ecdf).

You can use options in the CDFPLOT statement to

superimpose specification limits
superimpose fitted theoretical distributions (beta, exponential, gamma, lognormal, normal, and Weibull)
specify graphical enhancements (such as color or text height)

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