I have followed the IBM conjoint tutorial and am at the stage of analysing my results but there is an error in my syntax and i cant work out why. the syntax i have is:
CONJOINT PLAN='H:\Program Files\IBM\SPSS\Statistics\20\Samples\English\carpet_plan.sav'
/SEQUENCE=PREF1 PREF2 PREF3 PREF4 PREF5 PREF6 PREF7 PREF8 PREF9 PREF10 PREF11 PREF12 PREF13 PREF14 PREF15 PREF16 PREF17 PREF18 PREF19 PREF20 PREF21 PREF22
/FACTORS=PACKAGE BRAND (DISCRETE)
PRICE (LINEAR LESS)
SEAL (LINEAR MORE) MONEY (LINEAR MORE)
this is from the IBM samples data sets, the message i get is:
Text: PREF1 Command: CONJOINT
An undefined variable name, or a scratch or system variable was specified in a variable list which accepts only standard variables. Check spelling and verify the existence of this variable.
Execution of this command stops.
Unrecognized text appears where end of subcommand (slash) was expected.
SUBJECT SUBCOMMAND -- Subject variable is not on data file.
the PREF1 to PREF22 are the headings for each of the preference columns in my data set which is what it says to put.
any help on where i am going wrong would really be appreciated