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Home/ Questions/Q 9272499
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Editorial Team
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Editorial Team
Asked: June 18, 20262026-06-18T15:53:26+00:00 2026-06-18T15:53:26+00:00

I have a numpy array of datetime64 , and I would like to round

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I have a numpy array of datetime64, and I would like to round off the sub-second values of the array elements. E.g., from 2001-1-1 10:33:32.5 to 2001-1-1 10:33:32.0. I am looking for a vecotrized method.

More generally, I am looking for a vectorized method to round to any frequency (minutes, days, etc.).

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  1. Editorial Team
    Editorial Team
    2026-06-18T15:53:27+00:00Added an answer on June 18, 2026 at 3:53 pm

    rounded = numpy.array(myarray, dtype='datetime64[s]') or
    rounded = myarray.astype('datetime64[s]')

    This also works for minutes by using:

    rounded = numpy.array(myarray, dtype='datetime64[m]')
    
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