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scipy stats.arcsine() | Python
• Last Updated : 20 Mar, 2019

scipy.stats.arcsine() is an arcsine continuous random variable that is defined with a standard format and some shape parameters to complete its specification.

Parameters :
q : lower and upper tail probability
x : quantiles
loc : [optional]location parameter. Default = 0
scale : [optional]scale parameter. Default = 1
size : [tuple of ints, optional] shape or random variates.
moments : [optional] composed of letters [‘mvsk’]; ‘m’ = mean, ‘v’ = variance, ‘s’ = Fisher’s skew and ‘k’ = Fisher’s kurtosis. (default = ‘mv’).

Results : arcsine continuous random variable

Code #1 : Creating arcsine continuous random variable

 `# importing scipy``from` `scipy.stats ``import` `arcsine`` ` `numargs ``=` `arcsine.numargs``[ ] ``=` `[``0.6``, ] ``*` `numargs``rv ``=` `arcsine()`` ` `print` `(``"RV : \n"``, rv)`

Output :

```RV :
<scipy.stats._distn_infrastructure.rv_frozen object at 0x0000029484D796D8>```

Code #2 : arcsine random variates and probability distribution function.

 `quantile ``=` `np.arange (``0.01``, ``1``, ``0.1``)``  ` `# Random Variates``R ``=` `arcsine.rvs(scale ``=` `2``,  size ``=` `10``)``print` `(``"Random Variates : \n"``, R)`` ` `# PDF``R ``=` `arcsine.pdf(x ``=` `quantile, scale ``=` `2``)``print` `(``"\nProbability Distribution : \n"``, R)`

Output:

```Random Variates :
[1.17353658 1.96350916 1.73419819 0.71255312 0.28760466 1.54410451
1.9644408  0.35014597 0.26798525 0.24599504]

Probability Distribution :
[2.25643896 0.69810843 0.51917523 0.43977033 0.39423905 0.3651505
0.34568283 0.33260295 0.32421577 0.31960693]```

Code #3 : Graphical Representation.

 `# libraries``import` `numpy as np``import` `matplotlib.pyplot as plt`` ` `distribution ``=` `np.linspace(``0``, np.minimum(rv.dist.b, ``3``))``print` `(``"Distribution : \n"``, distribution)`` ` `plot ``=` `plt.plot(distribution, rv.pdf(distribution))`

Output :

```Distribution :
[0.         0.02040816 0.04081633 0.06122449 0.08163265 0.10204082
0.12244898 0.14285714 0.16326531 0.18367347 0.20408163 0.2244898
0.24489796 0.26530612 0.28571429 0.30612245 0.32653061 0.34693878
0.36734694 0.3877551  0.40816327 0.42857143 0.44897959 0.46938776
0.48979592 0.51020408 0.53061224 0.55102041 0.57142857 0.59183673
0.6122449  0.63265306 0.65306122 0.67346939 0.69387755 0.71428571
0.73469388 0.75510204 0.7755102  0.79591837 0.81632653 0.83673469
0.85714286 0.87755102 0.89795918 0.91836735 0.93877551 0.95918367
0.97959184 1.        ]
```

Code #4: Varying Location and Scale

 `from` `scipy.stats ``import` `arcsine``import` `matplotlib.pyplot as plt``import` `numpy as np``a ``=` `2``b ``=` `2``x ``=` `np.linspace(``0``, np.minimum(rv.dist.b, ``3``))`` ` `# Varying location and scale``y1 ``=` `arcsine.pdf(x, ``-``0.1``, .``8``)``y2 ``=` `arcsine.pdf(x, ``-``3.25``, ``3.25``)``plt.plot(x, y1, ``"*"``, x, y2, ``"r--"``)`

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