Task: select a minimum sample of cases that taken together, provide at least one example of all specified conditions, for QC For example I might want to find at least one case where var1 is nonmissing. I might need to see at least one case where variable, HHincome > 50,000 Purpose/context: I'm working on an application that displays on the computer, information about a single person, with values populated by background datasets. In order to verify that everything is working properly, I have to eye-ball at least one example that shows me that a date, for example, is displaying in the correct format, and at least one example that proves that a second email is showing up. If these are rare, I might have to look at two different cases. But I have at least 100 variables or conditions of interest that occur rarely, and for reasons I won't get into, it is impractical to view/document over a hundred examples. I was thinking that I could set up a series of arrays that keep track of which cases can be observed to verify that each condition is addressed. I could then analyze the info in the arrays to come up with a sample of cases that taken together, make if possible to do a complete QC. Does that make sense? Do you have other ideas? Thanks .
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