help needed in map reduce code.

hello .. i am trying to convert the UTC to GMT data format with MapReduce on desktop platform.i want to convert the time into datetime format.like this

2016-25-07 01:26:40    
2016-25-07 01:26:40    
2016-25-07 01:26:40    
2016-25-07 01:26:40    
2016-25-07 01:26:40    
2016-25-07 04:13:20    
2016-25-07 04:13:20    
2016-25-07 04:13:20    
2016-25-07 01:26:40    
2016-25-07 01:26:40    
2016-25-07 01:26:40    
2016-25-07 07:00:00    
2016-25-07 07:00:00    
2016-25-07 07:00:00    
2016-25-07 07:00:00    
2016-25-07 07:00:00    
2016-25-07 07:00:00    
2016-25-07 07:00:00    
2016-25-07 07:00:00    
2016-25-07 07:00:00    
2016-25-07 07:00:00    
2016-25-07 07:00:00    
2016-25-07 07:00:00    
2016-25-07 07:00:00    
2016-25-07 07:00:00    
2016-25-07 07:00:00    
2016-25-07 07:00:00    
2016-25-07 07:00:00    
2016-25-07 07:00:00

i am getting wrong results from my code. can someone help me

   >> read(outds)
   ans = 
     Key            Value       
    ______    __________________
    'date'    [18598x1 datetime]
  end

function Map(data, info, intermKVStore)
  %datetime = data.RequestTime(~isnan(data.RequestTime));
  dateformated=datetime(data.RequestTime/1000,'ConvertFrom','posixTime',...
    'TimeZone','Asia/Hong_Kong','Format','dd-MMM-yyyy HH:mm:ss.SSS')

     add(intermKVStore, 'datetime', dateformated);
  end

function reduce(intermKey, intermValIter, outKVStore)
    date = 0;
    while hasnext(intermValIter)
        date = date + getnext(intermValIter);
    end
add(outKVStore,'date',date);
end

Answer 1

[Guillaume]

If your input is in UTC and you want the datetime objects to display time in your local timezone, you first need to construct the datetime object in UTC timezone then switch to your local one:

   dateformated=datetime(data.RequestTime/1000,'ConvertFrom','posixTime',...
    'TimeZone','UTC','Format','dd-MMM-yyyy HH:mm:ss.SSS');  %read data as Posix UTC
   dateformated.Timezone = ''Asia/Hong_Kong'; %switch to new timezone. dateformated is adjusted accordingly

Note: Is your purpose really to add all the dates together? If so, why don't you first do it in the map function to reduce memory usage?

[naadiya khudabux]

No I just want to convert to local time zone and save as date time vector