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...ect, but rows (obviously) are not. (I did confirm that the desired value exists multiple times in the noted column, so 0 is definitely incorrect) As well, I would like to work with PRVDR_NUM as a variable alone, but I've found that with any of these variables/column names, I have to use "allinpatient$PRVDR_NUM." R does not recognize PRVDR_NUM alone. Why? More and more I think my problem is more foundational, meaning using the read.fwf function in the first place? Not using the read.fwf function correctly? Again, I've made enough progress with other variables & data sets of...