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sciPy stats.relfreq() function | Python
• Last Updated : 13 Feb, 2019

`scipy.stats.relfreq(a, numbins, defaultreallimits, weights)` is a relative frequency histogram, using the histogram function.

Parameters :
arr : [array_like] input array.
numbins : Number of bins to use for the histogram. [Default = 10]
defaultreallimits : (lower, upper) range of the histogram.
weights : [array_like] weights for each array element.

Results :
– relative frequency binned values
– width of each bin
– lower real limit
– extra points.

Code #1:

 `# relative frequency``from` `scipy ``import` `stats``import` `numpy as np `` ` `arr1 ``=` `[``1``, ``3``, ``27``, ``2``, ``5``, ``13``] ``print` `(``"Array element : "``, arr1, ``"\n"``)`` ` `a, b, c, d ``=` `stats.relfreq(arr1, numbins ``=` `4``)`` ` `print` `(``"cumulative frequency : "``, a)``print` `(``"Lower Limit : "``, b)``print` `(``"bin size : "``, c)``print` `(``"extra-points : "``, d)`

Output :

```Array element :  [1, 3, 27, 2, 5, 13]

cumulative frequency :  [0.66666667 0.16666667 0.         0.16666667]
Lower Limit :  -3.333333333333333
bin size :  8.666666666666666
extra-points :  0
```

Code #2:

 `# relative frequency``from` `scipy ``import` `stats``import` `numpy as np `` ` `arr1 ``=` `[``1``, ``3``, ``27``, ``2``, ``5``, ``13``] ``print` `(``"Array element : "``, arr1, ``"\n"``)`` ` `a, b, c, d ``=` `stats.relfreq(arr1, numbins ``=` `4``,``              ``weights ``=` `[.``1``, .``2``, .``1``, .``3``, ``1``, ``6``])`` ` `print` `(``"cumfreqs : "``, a)``print` `(``"lowlim : "``, b)``print` `(``"binsize : "``, c)``print` `(``"extrapoints : "``, d)`

Output :

```Array element :  [1, 3, 27, 2, 5, 13]

cumfreqs :  [0.26666667 1.         0.         0.01666667]
lowlim :  -3.333333333333333
binsize :  8.666666666666666
extrapoints :  0```

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