cdfcalc
              Calculate an empirical cumulative distribution function.
 [yCDF, xCDF] = cdfcalc (x) calculates an empirical
 cumulative distribution function (CDF) of the observations in the data sample
 vector x.  x may be a row or column vector, and represents a
 random sample of observations from some underlying distribution.  On return
 xCDF is the set of x values at which the CDF increases.
 At XCDF(i), the function increases from YCDF(i) to YCDF(i+1).
 [yCDF, xCDF, n] = cdfcalc (x) also returns
 n, the sample size.
 [yCDF, xCDF, n, emsg, eid] = cdfcalc
 (x) also returns an error message and error id if x is not a
 vector or if it contains no values other than NaN.
See also: cdfplot
Source Code: cdfcalc