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# numpy.frexp

`numpy.``frexp`(x[, out1, out2]) = <ufunc 'frexp'>

  Decompose the elements of x into mantissa and twos exponent.

  Returns (mantissa, exponent), where x = mantissa * 2**exponent`. The mantissa is lies in the open interval(-1, 1), while the twos exponent is a signed integer.

  Parameters: | x : array_like Array of numbers to be decomposed. out1 : ndarray, optional Output array for the mantissa. Must have the same shape as x. out2 : ndarray, optional Output array for the exponent. Must have the same shape as x.
  Returns: | (mantissa, exponent) : tuple of ndarrays, (float, int) mantissa is a float array with values between -1 and 1. exponent is an int array which represents the exponent of 2.

  See also

  `ldexp`
    Compute `y = x1 * 2**x2`, the inverse of `frexp`.

  Notes

  Complex dtypes are not supported, they will raise a TypeError.

  Examples

      >>> x = np.arange(9)
      >>> y1, y2 = np.frexp(x)
      >>> y1
      array([ 0.   ,  0.5  ,  0.5  ,  0.75 ,  0.5  ,  0.625,  0.75 ,  0.875,
              0.5  ])
      >>> y2
      array([0, 1, 2, 2, 3, 3, 3, 3, 4])
      >>> y1 * 2**y2
      array([ 0.,  1.,  2.,  3.,  4.,  5.,  6.,  7.,  8.])