[SciPy-user] round all element of an array

Nicholas Kottenstette nkottens at nd.edu
Fri Jan 12 09:47:55 CST 2007


Giorgio Luciano wrote:
> I've searched in the manual and find nothing
> Is it possible to round all the value of an array to fixed decimanls ?
> The option round works for scalar but not for array
> Thanks in advance for replys
> Giorgio
>
>
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>   
?scipy.round_

Base Class:       <type 'function'> String Form:   <function round_ at 
0xb7a8f454> Namespace:        Interactive
File:             
/usr/local/neclab_tools/lib/python2.4/site-packages/numpy/core/fromnumeric.py
Definition:       scipy.round_(a, decimals=0, out=None)
Docstring:
    Returns reference to result. Copies a and rounds to 'decimals' places.

    Keyword arguments:
        decimals -- number of decimal places to round to (default 0).
        out -- existing array to use for output (default copy of a).

    Returns:
        Reference to out, where None specifies a copy of the original 
array a.

    Round to the specified number of decimals. 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.

    The keyword 'out' may be used to specify a different array to hold the
    result rather than the default 'a'. If the type of the array 
specified by
    'out' differs from that of 'a', the result is cast to the new type,
    otherwise the original type is kept. Floats round to floats by default.

    Numpy rounds to even. Thus 1.5 and 2.5 round to 2.0, -0.5 and 0.5 
round to
    0.0, etc. Results may also be surprising due to the inexact 
representation
    of decimal fractions in IEEE floating point and the errors introduced in
    scaling the numbers when 'decimals' is something other than 0.

    The function around is an alias for round_.

Sincerely,

Nicholas Kottenstette


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