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# scipy.stats.mstats.betai

`scipy.stats.mstats.``betai`(a, b, x)

  Returns the incomplete beta function.

  I_x(a,b) = 1/B(a,b)*(Integral(0,x) of t^(a-1)(1-t)^(b-1) dt)

  where a,b>0 and B(a,b) = G(a)*G(b)/(G(a+b)) where G(a) is the gamma function of a.

  The standard broadcasting rules apply to a, b, and x.

  Parameters: | a : array_like or float > 0 b : array_like or float > 0 x : array_like or float x will be clipped to be no greater than 1.0 .
  Returns: | betai : ndarray Incomplete beta function.