topic Re: Calculate decile/quartile/quintile etc when data is aggregated. in QlikView

Calculate decile/quartile/quintile etc when data is aggregated.

ljdlumley — Thu, 26 Oct 2017 11:02:34 GMT

Hello,

I've looked through the help and Community pages but can't find a solution to my issue.

I'm attempting to find the decile position of a Course of the average Mark for students on a Course.

Using dummy data with just one value per course it works absolutely perfectly with the following;

if(Mark<=Fractile(TOTAL Mark,0.1),1,

if(Mark<=Fractile(TOTAL Mark,0.2),2,

if(Mark<=Fractile(TOTAL Mark,0.3),3,

if(Mark<=Fractile(TOTAL Mark,0.4),4,

if(Mark<=Fractile(TOTAL Mark,0.5),5,

if(Mark<=Fractile(TOTAL Mark,0.6),6,

if(Mark<=Fractile(TOTAL Mark,0.7),7,

if(Mark<=Fractile(TOTAL Mark,0.8),8,

if(Mark<=Fractile(TOTAL Mark,0.9),9,10)))))))))

In my real data the expression needs to be Avg(Mark) to calculate the average for all students on the course

if(Avg(Mark)<=Fractile(TOTAL Avg(Mark),0.1),1,

if(Avg(Mark)<=Fractile(TOTAL Avg(Mark),0.2),2,

if(Avg(Mark)<=Fractile(TOTAL Avg(Mark),0.3),3,

if(Avg(Mark)<=Fractile(TOTAL Avg(Mark),0.4),4,

if(Avg(Mark)<=Fractile(TOTAL Avg(Mark),0.5),5,

if(Avg(Mark)<=Fractile(TOTAL Avg(Mark),0.6),6,

if(Avg(Mark)<=Fractile(TOTAL Avg(Mark),0.7),7,

if(Avg(Mark)<=Fractile(TOTAL Avg(Mark),0.8),8,

if(Avg(Mark)<=Fractile(TOTAL Avg(Mark),0.9),9,10)))))))))

This gives every Course a value of 10, the final False value above. My thinking so far is that I need to add in Aggr somewhere but everything I've tried has failed.

Any suggestions would be very gratefully received.

Thanks in advance

John

Re: Calculate decile/quartile/quintile etc when data is aggregated.

sunny_talwar — Thu, 26 Oct 2017 11:30:55 GMT

May be this

if(Avg(Mark) <= Fractile(TOTAL Aggr(Avg(Mark), Student), 0.1),1,

if(Avg(Mark) <= Fractile(TOTAL Aggr(Avg(Mark), Student), 0.2),2,

if(Avg(Mark) <= Fractile(TOTAL Aggr(Avg(Mark), Student), 0.3),3,

if(Avg(Mark) <= Fractile(TOTAL Aggr(Avg(Mark), Student), 0.4),4,

if(Avg(Mark) <= Fractile(TOTAL Aggr(Avg(Mark), Student), 0.5),5,

if(Avg(Mark) <= Fractile(TOTAL Aggr(Avg(Mark), Student), 0.6),6,

if(Avg(Mark) <= Fractile(TOTAL Aggr(Avg(Mark), Student), 0.7),7,

if(Avg(Mark) <= Fractile(TOTAL Aggr(Avg(Mark), Student), 0.8),8,

if(Avg(Mark) <= Fractile(TOTAL Aggr(Avg(Mark), Student), 0.9),9,10)))))))))

Also, are you using this as an expression or a dimension? If this is an dimension, then try this

Aggr(