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Hello,
I have this complex project and need some help. I have a dashboard with several objects mostly based on trend analysis.
the dashboard is slow because most objects are based on agg function. I am trying to move some of the codes to the load script.
If(Service Type]='design' ,[Limit] -
LINEST_B({$<Date=>} Aggr(Sum({$<Date=>} [Metric Value]), Date,[Pipe Type],[Interface Type],Metric), Date))
/ LINEST_M({$<Date=>} Aggr(Sum({$<Date=>} [Metric Value]), Date,[Pipe Type],[Interface Type],Metric), Date)), Date) >= $(Numberofmonths)
Note ;
The chart displays the date when specific pipes will hit their limit
Dimensions on the Straight table are: ,[Pipe Type],[Interface Type],Metric
$(Numberofmonths) is a variable currently that allows for the selection of 3 ;6;12 months to see those that will hit the limit during that period.
Question:
is it possible to write a similar query /scenario in the load script because the above calculation is running on a large amount of data ?
any other suggestions or ideas?
Regards
If you want to calculate things in the script then you first need to create a table that calculates the sum of [Metric Value] aggregated over the fields Date, [Pipe Type], [Interface Type] and Metric. You can add a where clause to filter on [Service Type] = design. Once you can that table you can create a new table to calculate the Linest_B and Linest_M and the division of the two over the sums of Metric over the Date field.
Btw. that expression you posted cannot work. The brackets and parentheses don't match up. I also don't understand how the >= $(Numberofmonths) fits with the rest of the expression
Hi Gysbert,
the actual script is below.
1- the dimensions are ,[Node Name],[Interface Name],Metric
2- [Metric Value $(vL.MetricValue)] is because there are calculated fields in the data such as [Metric Value avg] and [Metric Value max] that the user can select in the front end.
3- the expression currently works but really slow.
when you said to aggregate in the load script you mean Group By?
could you explain how to perform the Linest_B and Linest_M and the division in the load script?
Thanks
when you said to aggregate in the load script you mean Group By?
Yes. And the linest functions are just aggregation functions too just like sum so you use a group by for those too. You said your chart dimensions are [Pipe Type],[Interface Type],Metric. You need to aggregate over those fields.