### Navigation

- index
- modules |
- modules |
- next |
- previous |
- SciPy v0.9 Reference Guide (DRAFT) »
- Statistical functions (`scipy.stats`) »

# scipy.stats.cumfreq

`scipy.stats.``cumfreq`(a, numbins=10, defaultreallimits=None, weights=None)

  Returns a cumulative frequency histogram, using the histogram function.

  Parameters : | a : array_like Input array. numbins: int, optional : The number of bins to use for the histogram. Default is 10. defaultlimits: tuple (lower, upper), optional : The lower and upper values for the range of the histogram. If no value is given, a range slightly larger then the range of the values in a is used. Specifically `(a.min() - s, a.max() + s)`, where `s = (1/2)(a.max() - a.min()) / (numbins - 1)`. weights: array_like, optional : The weights for each value in a. Default is None, which gives each value a weight of 1.0
  Returns : | cumfreq : ndarray Binned values of cumulative frequency. lowerreallimit : float Lower real limit binsize : float Width of each bin. extrapoints : int Extra points.

  Examples

      >>> x = [1, 4, 2, 1, 3, 1]
      >>> cumfreqs, lowlim, binsize, extrapoints = sp.stats.cumfreq(x, numbins=4)
      >>> cumfreqs
      array([ 3.,  4.,  5.,  6.])
      >>> cumfreqs, lowlim, binsize, extrapoints =     ...     sp.stats.cumfreq(x, numbins=4, defaultreallimits=(1.5, 5))
      >>> cumfreqs
      array([ 1.,  2.,  3.,  3.])
      >>> extrapoints
      3

### Navigation

- index
- modules |
- modules |
- next |
- previous |
- SciPy v0.9 Reference Guide (DRAFT) »
- Statistical functions (`scipy.stats`) »