MATLAB: Convert datenum to date time series

datenumdatetimeMATLAB

Hi,
I have a ncfile with datenum values <ftp://ftp.cdc.noaa.gov/Datasets/cpc_global_temp/>. Since I have to adjust the time series with another set of data, I tried to convert them to date time series but the values are off. I tried some solution given in MathWorks but non of them worked.
The nc file says:
    time
           Size:       365x1
           Dimensions: time
           Datatype:   double
           Attributes:
                       long_name          = 'Time'
                       axis               = 'T'
                       standard_name      = 'time'
                       coordinate_defines = 'start'
                       actual_range       = [1008072  1016808]
                       units              = 'hours since 1900-01-01 00:00:00'
                       delta_t            = '0000-00-01 00:00:00'
                       avg_period         = '0000-00-01 00:00:00'
How needs to be the conversion from their datenum to MATlab's datenum? Or is there another way to do it?
Any help is appreciated.
Thanks.

Best Answer

You can do this:
>> datetime(1900,1,1,0,0,0) + hours([1008072 1016808])
ans = 
  1×2 datetime array
   01-Jan-2015 00:00:00   31-Dec-2015 00:00:00
Or this (but more typing):
>> datetime([1008072 1016808]*3600,'ConvertFrom','EpochTime','Epoch',datetime(1900,1,1,0,0,0))
ans = 
  1×2 datetime array
   01-Jan-2015 00:00:00   31-Dec-2015 00:00:00
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