Re: [Matplotlib-users] date list to dates converter

[John H. <jdh...@ac...>]

>>>>> "Stephen" == Stephen Walton <ste...@cs...> writes:

    Stephen> I need a function which will take an N by 3 or N by 6
    Stephen> array, where the columns are year, month, day in the
    Stephen> first case and those three plus hours, minutes, and
    Stephen> seconds in the second case and convert them to matplotlib
    Stephen> dates.  This would work the same as the MATLAB datenum()
    Stephen> function.

Hi Stephen,

How about

    from datetime import datetime
    from pylab import date2num
    x = ...your array
    dts = date2num([ datetime(y,m,d) for y,m,d in x ])

or for the Nx6 case

    dts = date2num([ datetime(y,m,d,h,min,s) for y,m,d,h,min,s in x ])

or more succinctly

    dts = date2num([ datetime(*date) for date in x ])

FYI, date2num is found in matplotlib.dates.  I'll take a look at the
matlab datenum docstring in matlab and see about including this
functionality in the matplotlib.dates version.

Cheers,
JDH