Can R support data manipulation programming that is available in the SAS datastep?  Specifically, can R support the following:
-          Read multiple dataset one record at a time and compare values from each; then base on if-then logic write to multiple output files
-          Load a lookup table and then process a different file; based on if-then logic, access and lookup values in the table
-          Support modular “gosub”programming
-          Sort files
-          Date math and conversions
-          Would it be able to support the following type of logic:
o   Start
§  Read Record from File 1
§  Read Record from File 2
§  Match
·         If Key 1 <> Key 2 and Key 1 < Key 2, Write to output file A
·         If Key 1 = Key 2, Write to output file B
·         If Key 1 <> Key 2 and Key 1 > Key 2, Write to output file C§  Goto Start until File 1 Done
 John Filben
Cell Phone - 773.401.2822
Email - johnfilben@yahoo.com 


      
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