# numpy.matlib.randn

matlib.randn(*args)

  Return a random matrix with data from the “standard normal” distribution.

  `randn` generates a matrix filled with random floats sampled from a univariate “normal” (Gaussian) distribution of mean 0 and variance 1.

  Parameters:
    *args Arguments

      Shape of the output. If given as N integers, each integer specifies the size of one dimension. If given as a tuple, this tuple gives the complete shape.

  Returns:
    Z matrix of floats

      A matrix of floating-point samples drawn from the standard normal distribution.

  See also

  `rand`, `numpy.random.RandomState.randn`

  Notes

  For random samples from the normal distribution with mean `mu` and standard deviation `sigma`, use:

      sigma * np.matlib.randn(...) + mu

  Examples

      >>> np.random.seed(123)
      >>> import numpy.matlib
      >>> np.matlib.randn(1)
      matrix([[-1.0856306]])
      >>> np.matlib.randn(1, 2, 3)
      matrix([[ 0.99734545,  0.2829785 , -1.50629471],
              [-0.57860025,  1.65143654, -2.42667924]])

  Two-by-four matrix of samples from the normal distribution with mean 3 and standard deviation 2.5:

      >>> 2.5 * np.matlib.randn((2, 4)) + 3
      matrix([[1.92771843, 6.16484065, 0.83314899, 1.30278462],
              [2.76322758, 6.72847407, 1.40274501, 1.8900451 ]])