Count-selected in group not having desired effect

[Oyier]

Team,
Im having a challenge using count-selected on a field list of items with yes/no answers.
I have a set of 7 questions but need most important 3 answers, tried to use count-selected(.)<=3
in a group but no effect, any help?

[Grzesiek2010]

Hi @Oyier

count-selected() function works for one select_multiple question not for a group of different questions. If you know which questions you want to be answered you can make them required otherwise if they are random but always three you can use constraint.

[danbjoseph]

There's also now rank support in ODK Collect?

Collect question type: rank items

The first beta for v1.16.0 is rolling out now and includes rank support! Please learn more about the beta program and join to try this out. You can download the Rank Test form from the default server. XLSForm support is coming soon. Is the interface clear? Some potential changes we have discussed are: adding numbers to the left of the items to indicate which rank each has changing the "Tap twice to start" interface to use a button like with the date or geo widgets

[Xiphware]

@Oyier

I have a set of 7 questions but need most important 3 answers, tried to use count-selected(.)<=3

As Grzegorz said, the count-selected() function doesnt operate on a group level. So you'll need to 'count' your group's questions explicitly. If - by 'selected' - you mean answer='yes', then something like this should do the trick:

calculate="(${question1}='yes') + (${question2}='yes') + (${question3}='yes') + ..."

Which will give you the total number of questions to which you answered 'yes'. [this works by virtue of fact XPath will cast the boolean subexpressions to 0 or 1 accordingly, which you then sum numerically]