Recoding into binary variables multiple responses done by choice vars. -----------------------------------------------------------------------
^zb_qrm^ rootch nch rootnew nnew
Description ------------
^zb_qrm^ generates 'nnew' new binary variables according to the code of the 'rootexist' variables. Usually multiple choices are registred in variables representing first choice, second choice etc. The name of these variables are assumed to be numbered from 1 to the maximum number of choices. The 'rootch' parameter specifies the root-string in the names and the names are 'rootch1' 'rootch2'. The same naming convention exists for the new binary variables having the root string 'rootnew' and are numbered from 1 to 'nnew'. The codes in the existing variables must be the same. Missing values are allowed. The program zb_qrm print a frequency statistic of each code and one of the combinations of all codes.
Remarks --------
Parameters (no one is optional) -----------
rootch : Root string of 7 or fever characters which is the rootname of the input vars. nch : Number of input variables or choices.
rootnew : Root string of 7 or fever characters which is the rootname of the output vars. nnew : Number of codes in the input variables and number of output variables
Beside the new numbered output variable a new variable having only the 'rootnew' name will be created representing all combinations of the output variables.
Example --------
. ^zb_qrm test 6 testb 15^ This will analyse the variables test1-test6 and create testb1-testb15
Author -------
Eric Zbinden Zbinden@@cmu.unige.ch
Also see ---------
help for @rccode@ if installed