topic Re: Solution to Change calculation per field selection in App Development

Solution to Change calculation per field selection

50ShadesOfSalty — Sat, 30 Oct 2021 18:19:29 GMT

Hi everyone,

Seeking guidance and help on the best performance solution.

Problem: Using a filter panel to change the calculation on charts

Imagine that I need to have a [field] (not available in the DataModel of the Application) with the following values:

Interaction
InteractionAggr
InteractionAvg

This field needs to be available in a Filter Panel visualization. Once the user switch between different values, the charts need to update their calculations.

My idea would be to have a general calculation that is going to change the measure taking into account the [Field] selection, for example:

Sum( {<Set Analysis>} [$(vMeasureToChange)] )

Then, depending on the user selection, the calculation would be as the following:

[field] = 'Interaction'
- Sum( {<Set Analysis>} [Interaction] )
[field] = 'InteractionAggr'
- Sum( {<Set Analysis>} [InteractionAggr] )
[field] = 'InteractionAvg'
- Sum( {<Set Analysis>} [InteractionAvg] )

In this way, i would avoid performance issues with If's and picks in the front-end.

However, i need guidance on how to do this.

Is it possible to work only in the front-end + variables? This would be the perfect scenario taking into account Environment limitations that we have at this moment. Tried to use valuelist() function in the Filter Panel visualization, but it does not allow any value to be selected in the DataModel, as long as it is a synthetic dimension.

Do i need to work in the Script in order to make this behaviour work? If so, what's the guidance?

Thank you for the help and guidance.

Best regards.

Re: Solution to Change calculation per field selection

Vegar — Sat, 30 Oct 2021 18:45:00 GMT

You could try this:

Sum( {<Set Analysis>} [$(=(Maxstring(field)))] )

Re: Solution to Change calculation per field selection

50ShadesOfSalty — Sat, 30 Oct 2021 19:01:59 GMT

Hey everyone,

Seems that i found a solution. Don't know if it would be the best in terms of performance, but here it is:

1. Create a Island Table with the values that we need to provide for the user selections

Island_table:
LOAD * Inline
[
Interaction Type
Interaction
InteractionAggr
InteractionAvg
];

2. Create a variable that looks at the selection done by the user

$(vTeste1)

=if(GetFieldSelections([Interaction Type])='Interaction', 'Interaction',
if(GetFieldSelections([Interaction Type])='InteractionAggr', 'InteractionAggr', 'InteractionAvg'))

3.Have a general calculation

Sum( [$(vTeste1)] )

Have a nice weekend!