Classification based on calculated range in load script

[#1]

Hi all

I have the following script to group airports based on a calculated index into A, B, C and D. However, Qlikview keeps detecting and error. Can anyone help?

//CALCULATION OF DEPARTURE AIRPORT INDEX 

NoConcatenate 

DEP_AIRPORT_INDEX: 

LOAD *, 

(DEP_CARRIER/MAX_DEP_CARRIER)+(DEP_FLIGHTS/MAX_DEP_FLIGHTS)+(DEP_DIST_GROUP/MAX_DEP_DIST_GROUP)+(DEP_AIRPORT_COUNT/MAX_DEP_AIRPORT_COUNT) as DEP_AIRPORT_INDEX 

Resident DEP_AIRPORT;// THIS IS A TABLE OF THE AIRPORTS WITH ALL OF THEIR RESPECTIVE ATTRIBUTES

//ASSIGNING GRADES TO THE AIRPORTS

NoConcatenate

DEP_AIRPORT_GRADE:

LOAD*,

if (DEP_AIRPORT_INDEX<=fractile(DEP_AIRPORT_INDEX,0.25),'D',

if (fractile(DEP_AIRPORT_INDEX,0.25)<DEP_AIRPORT_INDEX<=fractile(DEP_AIRPORT_INDEX,0.5),'C',

if (fractile(DEP_AIRPORT_INDEX,0.5)<DEP_AIRPORT_INDEX<=fractile(DEP_AIRPORT_INDEX,0.75),'B',

if (fractile(DEP_AIRPORT_INDEX,0.75)<DEP_AIRPORT_INDEX,'A', 'NULL')))) as GRADE_DEP_AIRPORT

FROM DEP_AIRPORT;

[Clever_Anjos]

You should post your question only once: Classification based on calculated value

[swuehl]

Fractile() is a statistical aggregation function. Aggregations in general need a GROUP BY clause when used in the script, and all fields not listed in the group by clause need to be aggregated.