# numpy.ma.round

ma.round(a, decimals=0, out=None)

  Return a copy of a, rounded to ‘decimals’ places.

  When ‘decimals’ is negative, it specifies the number of positions to the left of the decimal point. The real and imaginary parts of complex numbers are rounded separately. Nothing is done if the array is not of float type and ‘decimals’ is greater than or equal to 0.

  Parameters:
    decimals int

      Number of decimals to round to. May be negative.

    out array_like

      Existing array to use for output. If not given, returns a default copy of a.

  Notes

  If out is given and does not have a mask attribute, the mask of a is lost!

  Examples

      >>> import numpy.ma as ma
      >>> x = [11.2, -3.973, 0.801, -1.41]
      >>> mask = [0, 0, 0, 1]
      >>> masked_x = ma.masked_array(x, mask)
      >>> masked_x
      masked_array(data=[11.2, -3.973, 0.801, --],
                   mask=[False, False, False, True],
          fill_value=1e+20)
      >>> ma.round_(masked_x)
      masked_array(data=[11.0, -4.0, 1.0, --],
                   mask=[False, False, False, True],
          fill_value=1e+20)
      >>> ma.round(masked_x, decimals=1)
      masked_array(data=[11.2, -4.0, 0.8, --],
                   mask=[False, False, False, True],
          fill_value=1e+20)
      >>> ma.round_(masked_x, decimals=-1)
      masked_array(data=[10.0, -0.0, 0.0, --],
                   mask=[False, False, False, True],
          fill_value=1e+20)