What is PDV (Program Data Vector)?

1.	What is PDV (Program Data Vector)?
Answer» LOGICAL areas of memory where SAS builds data sets, one OBSERVATION at a time are called Program data vectors (PDVs). Whenever a program is executed, SAS usually reads data values from the input buffer or generates them based on SAS language STATEMENTS and assigns these data values to specific or RESPECTIVE VARIABLES in the program data vector. The program data vector also includes two automatic variables i.e., _N_ and _ERROR_ variable.

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