Re: st: Comparing two data set

["Robert L. Hellpap" <rhellpap@empas.uni-bremen.de>]

How about appending the data and using loops to create a difference  
indication variable? If the new appended variables have the same name  
as the old ones plus for example a 1 should it be possible to do it  
like :

foreach x in firstoldvar-lastoldvar{
gen `x'dif=0
forvalues i=1(1)1000{
replace `x'dif=1 if `x'!=`x'1 & id==`i'
}
tab `x'1 id if `x'==1
}

Now for each individual both datasets are compared by their value, if  
they are not equal the vardif-dummy should be 1 and after the replace  
line the id's for which the value differs will be displayed. Not sure  
if this works without problems, would be interested about comments.  
(Even though I think the idea of merging is very smart und  
uncomplicated)
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