Answer / rajesh

list of 'by' variables tell SAS how data is stored in
source dataset or how it is to be represented in
output/output dataset.

PDV is used to write the observations in output dataset and
it does not get impected from any BY variable as data in
SAS always read sequencely. If BY vaialbes are there then
it just ensures that source dataset is sorted on list of BY
variables. It does not impact other thing.

Answer / cutepa1

Thanks Rajesh, Here I got the appropriate answer for the
above question. A PDV has got such two variables like
'first.<BY-variable> and last.<BY-variable> apart from other
temporary variables. Here a BY-variable is the variable that
is mentioned in BY statement. a first.<var> returns 1 when a
first obs of that variable's datavalue is iterated or
contributed and returns 0 for the remaining other obs whose
datavalue of that specified variable in the BY-statement.
Respectively it returns 1 for when last obs is contributed
with the usage of last.<BY-variable> and returns 0 for the
rest of the observations.
Here I got an example
=======
data ex;
set emp; /* a source table retrived from Oracle emp */
by deptno; /* we can call 'deptno' as our BY-variable */
lead=first.deptno; /* new variable called lead that returns
the value either 1 or 0 basing on deptno*/
follow=last.deptno;
run;

Answer / gajari rao

pls some one try to answer this question my friend is
waiting for your answer.

All the best pavan mandadi

what is prime numbers? how we can get plc write sas code?

5 Answers   Icon,

---

how do you want missing values handled? : Sas programming

0 Answers  

---

1.we can execute a macro with in a macro,by using call symput and symget can any one give me one example? 2.We can create the macro variables by using %let,%do,macro parameters,INTO clause in proc sql and call symput, can any one give me example to create macro variable with INTO clause and call symput? 3.

1 Answers  

---

create macros---you have 365 number of data and you need to merge it throw the macros,,,,,, data file1; input a @@; cards; 1 2 3 4 ; run; data file2; input a @@; cards; 5 6 7 8 ; run; data file3; input a @@; cards; 9 10 11 12 ; run;data file4; input a @@; cards; 13 14 15 16 ; run;

6 Answers   WNS,

---

How do you debug and test your SAS programs? What can you learn from the SAS log when debugging? How do you test for missing values? How would you create multiple observations from a single observation? What are some good SAS programming practices for processing very large data sets? Briefly describe 5 ways to do a "table lookup" in SAS. Why is SAS considered self-documenting? Are you sensitive to code walk-throughs, peer review, or QC review? What other SAS features do you use for error trapping and data validation? How does SAS handle missing values in: assignment statements, functions, a merge, an update, sort order, formats, PROCs?

2 Answers  

---

Please, anyone, let me know the style or an example of using 'by='/'by' variable of a PDV(Program Data Vector)

3 Answers   Verinon Technology Solutions,

---

Explain the use of proc gplot? : sas-grid-administration

0 Answers  

---

what is the usage for assigning error=1 in a dataset ?

2 Answers   Satyam,

---

what are several options for creating reports in web report studio? : Sas-bi

0 Answers  

---

Give an example where SAS fails to convert character value to numeric value automatically?

0 Answers  

---

What is a macro routine?

0 Answers  

---

how to assign a macro value to a variable?

8 Answers   CitiGroup,

---