I have the following variables:

     m = array(['2016-02-03T06:35:00.000000000', '2016-03- 07T12:09:00.000000000',
   '2016-04-05T07:57:00.000000000', '2016-05-03T10:29:00.000000000',
   '2016-05-30T19:23:00.000000000', '2016-08-11T05:03:00.000000000',
   '2016-09-06T04:27:00.000000000'], dtype='datetime64[ns]')

   n = array([9.60257044e+05, 2.73061146e+05, 6.30219177e+04, 2.18310433e+07,
   1.25728987e+04, 1.21189090e+05, 1.20494747e+06])
   o = array([1.10110070e+06, 3.19370657e+05, 4.99755918e+04, 3.26636779e+07,
   1.89902834e+04, 1.16384062e+05, 1.07328724e+06])

while trying to plot error bar in matplotlib using the following code:

    plt.scatter (m, n)
    plt.errorbar (m, n, yerr = o)

the errorbar is plotted in the horizontal axis not on the vertical axis. What may be the possible reasons behind this and how to overcome this? The plot is shown below