dhis2-users team mailing list archive

[Knut Staring <knutst@xxxxxxxxx>]

I'm not sure it is important to aggregate along the time dimension for
weekly data. But it is important to do so spatially, ie upwards in the
hierarchy.

Sent from my mobile
On Jun 15, 2013 11:36 AM, "Bob Jolliffe" <bobjolliffe@xxxxxxxxx> wrote:

> Aggregating from weeks to months will always be approximate so these
> anomalies will happen. Maybe some clever pro-rata scaling can be done.
>
>
> On 15 June 2013 10:39, Ola Hodne Titlestad <olati@xxxxxxxxxx> wrote:
>
>> Not very related, but one issue with weeks that came up in Uganda
>> recently is that monthly aggregates of the reporting rates of weekly
>> datasets got above 100% for months with 5 weeks. Seems the aggregation code
>> here assumes 4 weeks per month throughout the year and with 5 weeks of
>> reported datasets for some months the reporting rate got too high.
>>
>> Ola
>> ------
>> On 15 Jun 2013 11:24, "John Lewis" <johnlewis.hisp@xxxxxxxxx> wrote:
>>
>>> Hi all,
>>> Defining week start and end date is quite complicated. I had the same
>>> issue in bangladesh. The point also how do we aggregate it to month.
>>> Technically we break the data of a week which fall in two month, which is
>>> not a good idea.
>>> Instead of rewriting.entire aggregation engine would it better to define
>>> as daily data set. Since we collect data once a week we can use daily data
>>> set and modify data enter screen to show weekly end date.
>>>  On 15 Jun 2013 03:40, "Johannes Schnitzler" <schnitzlerj@xxxxxxxxx>
>>> wrote:
>>>
>>>> Dear All,
>>>>
>>>> How I have solved the issue in another application, also used for
>>>> Cambodia, is that I'm allowing to define the start day of the week e.g.
>>>> Monday, Tuesday, Wednesday .... as well as how many days "touching the new
>>>> year" are needed to qualify a week to be counted as week 1 of the new year.
>>>> This is part of the setting of the application and is used to calculate it
>>>> on the fly e.g. for data entry date / week selection. I have written the
>>>> code for this in R  (bad code... but it is working). This allows to deal
>>>> with a lot of countries.
>>>>
>>>> For ISO it is 4 days to qualify for the new year and the start day
>>>> depends on the country,
>>>> For Cambodia it is 1 day and start day is Wednesday.
>>>>
>>>> As in DHIS I'm storing the period type daily weekly monthly ....
>>>> And for the actual date I'm storing always start date, end date of the
>>>> period and in addition the Year and the TIme unit..
>>>> For weekly data: start date, end date, Week Number, Year of the week
>>>> (which might be of course be different from the Year of the first day of
>>>> the week for the first and last week of the year).
>>>> For daily data: start date, end date (which is of course the same), day
>>>> number  in year, Year
>>>> For monthly data: start date, end date, month number, Year
>>>> ....
>>>>
>>>> In this case one has all freedom to combine data sets from different
>>>> "week definitions" as one can decide later on which week calculation to be
>>>> applied across the piece based on the start date of the week knowing that
>>>> the week counting might be off for some of the countries for a few days.
>>>> But this is the best what we can do I assume ...
>>>>
>>>> Best regards,
>>>>
>>>> Johannes
>>>>
>>>>
>>>> On 14 June 2013 19:08, Knut Staring <knutst@xxxxxxxxx> wrote:
>>>>
>>>>> Will have to investigate and get back to you
>>>>>
>>>>> Sent from my mobile
>>>>> On Jun 14, 2013 6:06 PM, "Bob Jolliffe" <bobjolliffe@xxxxxxxxx> wrote:
>>>>>
>>>>>> how do they determine which day is day 1 of week 1?
>>>>>>
>>>>>>
>>>>>> On 14 June 2013 17:52, Knut Staring <knutst@xxxxxxxxx> wrote:
>>>>>>
>>>>>>> For my purposes, that's really all I know, and for my requirements
>>>>>>> it will be exactly parallel to countries that require Monday instead of
>>>>>>> Sunday.
>>>>>>>
>>>>>>> But certainly the Nepali, Ethiopian and several others have more
>>>>>>> complex requirements, which I think partly must be treated as separate
>>>>>>> cases.
>>>>>>>
>>>>>>>
>>>>>>> On Fri, Jun 14, 2013 at 5:42 PM, Bob Jolliffe <bobjolliffe@xxxxxxxxx
>>>>>>> > wrote:
>>>>>>>
>>>>>>>> Explain the Cambodian calendar a bit more.  I am sure there is more
>>>>>>>> to it than when the weeks start.  Or is that it?
>>>>>>>>
>>>>>>>>
>>>>>>>> On 14 June 2013 17:35, Knut Staring <knutst@xxxxxxxxx> wrote:
>>>>>>>>
>>>>>>>>> Thanks Jason and Bob.
>>>>>>>>>
>>>>>>>>> Unfortunately, this seems to be a pressing requirement in several
>>>>>>>>> countries
>>>>>>>>>
>>>>>>>>> I think one simplification that could be justified would be to
>>>>>>>>> have only one week type in one DHIS2 instance. Thus, the exact meaning of
>>>>>>>>> 2012W25 is defined by looking at the FIRSTDAYOFWEEK setting in the
>>>>>>>>> particular db (which probably should be displayed on the About DHIS 2 page.
>>>>>>>>>
>>>>>>>>> Of course, that does not solve interoperability issues (but rather
>>>>>>>>> it deteriorate through obfuscation), but I think it is reasonable to think
>>>>>>>>> that everyone in Cambodia uses weeks starting on Wednesdays.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Fri, Jun 14, 2013 at 5:29 PM, Bob Jolliffe <
>>>>>>>>> bobjolliffe@xxxxxxxxx> wrote:
>>>>>>>>>
>>>>>>>>>> Weeks are as we all know something of a headache.  What we have
>>>>>>>>>> defined currently in DHIS2, as Jason points out, is the ISO standard week,
>>>>>>>>>> which even itself is something of a headache.
>>>>>>>>>>
>>>>>>>>>> I suspect that to incorporate all the variety which is called for
>>>>>>>>>> (Wednesday week starts is the most exotic I've seen to date!  But there are
>>>>>>>>>> also Islamic calendar issues, Ethiopian/Amharic calendar, Monday vs Sunday
>>>>>>>>>> starts etc)  we might need to zoom right out to define a generic repeating
>>>>>>>>>> period with rules around starting and stopping.  But it could get quite
>>>>>>>>>> complicated.  Two immediate issues which come to mind
>>>>>>>>>> (i) we need a string representation of periods.  So 2010W23 has a
>>>>>>>>>> particular meaning in terms of the ISO week number.  How to differentiate
>>>>>>>>>> this from a week which starts on a Wednesday (and which day of the year
>>>>>>>>>> would be day 1 of week 1?);
>>>>>>>>>> (ii) how to aggregate along the time axis ie, weeks->months->years
>>>>>>>>>>
>>>>>>>>>> Its something which needs to be done, but I am not at all clear
>>>>>>>>>> what the correct design approach would be.  Would be interested to hear
>>>>>>>>>> people's thoughts.
>>>>>>>>>>
>>>>>>>>>> Bob
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On 14 June 2013 17:12, Knut Staring <knutst@xxxxxxxxx> wrote:
>>>>>>>>>>
>>>>>>>>>>> Devs: Is this something which could be targeted for 2.13?
>>>>>>>>>>>
>>>>>>>>>>> Knut
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On Mon, May 13, 2013 at 6:18 PM, Jason Pickering <
>>>>>>>>>>> jason.p.pickering@xxxxxxxxx> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Currently not. This has come up before, but for now, ISO weeks
>>>>>>>>>>>> are what has been implemented.
>>>>>>>>>>>>
>>>>>>>>>>>>  http://en.wikipedia.org/wiki/ISO_week_date
>>>>>>>>>>>>
>>>>>>>>>>>> Regards,
>>>>>>>>>>>> Jason
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> On Mon, May 13, 2013 at 6:54 PM, Paulo Grácio <
>>>>>>>>>>>> pgracio@xxxxxxxxxxxxxxxxxxxx> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> Hi, ****
>>>>>>>>>>>>>
>>>>>>>>>>>>> ** **
>>>>>>>>>>>>>
>>>>>>>>>>>>> Is there a way to define week start day for Weekly periods?***
>>>>>>>>>>>>> *
>>>>>>>>>>>>>
>>>>>>>>>>>>> ** **
>>>>>>>>>>>>>
>>>>>>>>>>>>> Regards,****
>>>>>>>>>>>>>
>>>>>>>>>>>>> Paulo Grácio****
>>>>>>>>>>>>>
>>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>>> Mailing list: https://launchpad.net/~dhis2-users
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>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>> Mailing list: https://launchpad.net/~dhis2-users
>>>>>>>>>>>> Post to     : dhis2-users@xxxxxxxxxxxxxxxxxxx
>>>>>>>>>>>> Unsubscribe : https://launchpad.net/~dhis2-users
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>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> --
>>>>>>>>>>> Knut Staring
>>>>>>>>>>> Dept. of Informatics, University of Oslo
>>>>>>>>>>> +4791880522
>>>>>>>>>>>  http://dhis2.org
>>>>>>>>>>>
>>>>>>>>>>> _______________________________________________
>>>>>>>>>>> Mailing list: https://launchpad.net/~dhis2-users
>>>>>>>>>>> Post to     : dhis2-users@xxxxxxxxxxxxxxxxxxx
>>>>>>>>>>> Unsubscribe : https://launchpad.net/~dhis2-users
>>>>>>>>>>> More help   : https://help.launchpad.net/ListHelp
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Knut Staring
>>>>>>>>> Dept. of Informatics, University of Oslo
>>>>>>>>> +4791880522
>>>>>>>>> http://dhis2.org
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Knut Staring
>>>>>>> Dept. of Informatics, University of Oslo
>>>>>>> +4791880522
>>>>>>> http://dhis2.org
>>>>>>>
>>>>>>
>>>>>>
>>>>> _______________________________________________
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>>>>>
>>>>>
>>>>
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>>>>
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>>>
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>>
>
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