https://communities.sas.com/t5/Statistical-Procedures/where-are-my-holdouts/m-p/53351#M2468 hey all,<BR /> <BR /> i am currently trying to analyse my discrete choice data, and i was hoping to get some advise from you.<BR /> <BR /> i created 16 holdout choice sets using kuhfeld's %mktex macro. They were tagged with the constant "w". Afterwards, transformed the linear design into a choice design, using %mktkey and %mktroll.<BR /> <BR /> The problem I am facing now is the following:<BR /> <BR /> Instead of my original72 choice sets, I have 88. However, i cannot identify which of the 88 choice sets is a holdout choice set, and which not, as data sets do not contain the indicating "w" constant anymore. I already collected my data.<BR /> <BR /> I doubt that I could just randomly extract 16 choice sets and use them as holdouts. So - how can I find out which 16 of the 88 choice sets are the holdouts?<BR /> <BR /> I really appreciate your help,<BR /> <BR /> cheers from europe Tue, 20 Jul 2010 22:23:03 GMT oraider 2010-07-20T22:23:03Z https://communities.sas.com/t5/Statistical-Procedures/where-are-my-holdouts/m-p/53351#M2468 hey all,<BR /> <BR /> i am currently trying to analyse my discrete choice data, and i was hoping to get some advise from you.<BR /> <BR /> i created 16 holdout choice sets using kuhfeld's %mktex macro. They were tagged with the constant "w". Afterwards, transformed the linear design into a choice design, using %mktkey and %mktroll.<BR /> <BR /> The problem I am facing now is the following:<BR /> <BR /> Instead of my original72 choice sets, I have 88. However, i cannot identify which of the 88 choice sets is a holdout choice set, and which not, as data sets do not contain the indicating "w" constant anymore. I already collected my data.<BR /> <BR /> I doubt that I could just randomly extract 16 choice sets and use them as holdouts. So - how can I find out which 16 of the 88 choice sets are the holdouts?<BR /> <BR /> I really appreciate your help,<BR /> <BR /> cheers from europe Tue, 20 Jul 2010 22:23:03 GMT https://communities.sas.com/t5/Statistical-Procedures/where-are-my-holdouts/m-p/53351#M2468 oraider 2010-07-20T22:23:03Z https://communities.sas.com/t5/Statistical-Procedures/where-are-my-holdouts/m-p/53352#M2469 it might be of interest that the log provides the following warning after i transformed the linear into a choice design:<BR /> <BR /> <BR /> WARNING: The variable W is in the DESIGN= data set but not the KEY= data set.<BR /> <BR /> maybe this helps.....<BR /> thanks Wed, 21 Jul 2010 08:59:51 GMT https://communities.sas.com/t5/Statistical-Procedures/where-are-my-holdouts/m-p/53352#M2469 oraider 2010-07-21T08:59:51Z