dhis2-devs team mailing list archive

[Brajesh Murari <brajesh.murari@xxxxxxxxx>]

Thanks Lasrs and Jason for clarifying us about mathematical operator "D" 
while creating indicators in DHIS2. I think DHIS2 user manuals should be 
updated and should include info and usability about it.
 
Regards
Brajesh Murari





On Tuesday, 11 February 2014 3:36 PM, Jason Pickering <jason.p.pickering@xxxxxxxxx> wrote:
 
Hi Brajesh,

No, that is not my understanding of how it works. "D" will always return the number of days in the period of interest. So, if you are looking at financial yearly data, "D" would be 365 (approximately depending on whether it is a leap year,etc) and if you are looking at monthly data, "D" would be the number of days in the month which you are interested in (approximately 30). For quarters, it would be approximately 90 (depending on the quarter). If you are aggregating to financial yearly, the the "Number of days equipment working" would be the sum of all the data values which fall within that period, i.e. the sum of 12 monthly periods if it is reported on a monthly frequency and  "D" would be as stated before, approximately 365.  It all depends on what frequency you are aggregating to. 

Maybe someone else can explain it better, but that is my understanding of how this works. 

Best regards,
Jason







On Tue, Feb 11, 2014 at 12:00 PM, Brajesh Murari <brajesh.murari@xxxxxxxxx> wrote:

Hi Jason,
>
>
>It means, if we will use "D" in indicator given below
>
>
>Number of days equipment not working 
>= [ {(Total Number of days in current month) - (Number of days equipment working)}/1 ]
>
>
>ie.
>
>
>Number of days equipment not working 
>= [ {(D) - (Number of days equipment working)}/1 ]
> 
>And if we provide input "Number of days equipment working" = 25 and aggregation level monthly, than it should return with value of indicator ie. "Number of days equipment not working" = 5 for all months in a financial year !
>
>
>Means, in monthly aggregation level selection or monthly period type selection, DHIS2 will always return value of "D" = 30, irrespective of months would be January or February or March or April or December ! for every month value of "D" = 30.
>
>
>Is that true Jason !
>
>
>Regards
>Brajesh Murari
>
>
>
>
>
>On Tuesday, 11 February 2014 2:53 PM, Jason Pickering <jason.p.pickering@xxxxxxxxx> wrote:
> 
>Hi Brajesh,
>I think this is exactly what Lars is getting at. In fact, the numerator must be "Total number of days in current period" not total number of days this month.
>
>For example, maybe "Number of days equipment working" has values of 20,25,and 28 for Jan, Feb and March. When you
 aggregegate the data to Quarter 1, these values would need to be added together to get 73 working days. The "D" value is always going to give you the total days in the period of interest, so in this case, it would be 31+28+31=90. Thus, in your example, the numerator would be (for a quarter)
>90 - 73 and your denominator would be 73, which would end up being 18.8% (which I guess is actually a percentage of downtime in this case).
>
>
>Best regards,
>Jason
>
>
>
>
>
>On Tue, Feb 11, 2014 at 10:25 AM, Brajesh Murari <brajesh.murari@xxxxxxxxx> wrote:
>
>Hi Lars,
>>
>>
>>I am in process of creating an indicator say for example
>>
>>
>>Number of days equipment not working 
>>= [ {(Total Number of days in current month) - (Number of days equipment working)}/1 ]
>>
>>
>>Here nominator is defined as an mathematical expression 
>>
>>
>>[ {(Total Number of days in current month) - (Number of days equipment working)}]
>>
>>
>>And here denominator is 1 and "Number of days equipment working" is an aggregated data element.
>>
>>
>>My query is how i can use mathematical operator "D" in above nominator for calculating 
>>"Total Number of days in current month" which is not a data element in expression given below ie.
>>
>>
>>[ {(Total Number of days in current month) - (Number of days equipment working)}]   
>>
>>
>>
>>Or, is there any other way to calculate or use "Total number of days in current month" while making indicator specially since it is a variable and varies month to month, say for example in Fab its value will be 28 or 29, in March its value will be 31, in April its value will be 30 etc.
>>
>>
>>Please clarify how we can make indicator like above and how we can use "Total number of days in current month" which is not a data element ?
>>
>>
>>Regards
>>Brajesh Murari  
>>
>>
>>
>>
>>
>>
>>
>>
>> 
>>Brajesh Murari
>>
>>
>>
>>
>>
>>On Tuesday, 11 February 2014 1:09 PM, Lars Helge Øverland <larshelge@xxxxxxxxx> wrote:
>> 
>>Hi Brajesh,
>>
>>
>>it indicates the number of days in the aggregation period. So if you ask for the aggregate value for a quarter, it will return 92 (or 91). You can then use this to calculate things like average number of something per day.
>>
>>
>>regards,
>>
>>
>>Lars
>>
>>
>>
>>
>>
>>On Tue, Feb 11, 2014 at 8:06 AM, Brajesh Murari <brajesh.murari@xxxxxxxxx> wrote:
>>
>>Hello List
>>>
>>>
>>>I have a very simple query regarding making of new indicator formula in DHIS2.
>>>When we use to define numerator and denumerator, we often found a series 
>>>mathematical operators like (,),+,-,*,/ and D
>>>
>>>
>>>My queries is what this D indicates here !
>>>When we put courser on D, tool tips comes with "Number of Days",
>>>does it indicates total number of days in current month !
>>>
>>>
>>>Please clarify. 
>>>
>>>
>>>Regards 
>>>Brajesh Murari
>>>
>>>
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>>
>>
>>
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>
>
>