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What is LOGICAL VARIABLES in SAS.And how it can be used..Can
anyone support..???
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Answer / sangeeta
Fitst. and Last. varibles used in data step are called
Logical Variables.
| Is This Answer Correct ? | 26 Yes | 3 No |
Answer / nagaraju
Fitst. and Last. varibles are logical variables and returns
1 & 0 values.
These are mailnly used to give the first and last
occurances from the table.
ex: employee table having (1-100 employees) -- uses
if we give first.empid=1 then it gives only first employee
details
if we give first.empid=0 then it gives remaining employee
details except first one
in the same way
if we give last.empid=1 then it gives last employee details
if we give last.empid=0 then it gives remaining employee
details except last one
hope this is clear
| Is This Answer Correct ? | 22 Yes | 3 No |
Answer / xxx
Yes I agree with the above answers,
first.obs and last.obs are also specifies the occurrence of the data. If we mention like
first.obs=1 and last.obs=1;
it will eliminate the duplicates also.
| Is This Answer Correct ? | 7 Yes | 0 No |
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