*Copyright @ www.mycsg.in;

Preparatory steps

null value representation in sas for character and numeric variables;
two automatic variables in sas: _error_ and _n_;
*Another automatic variable in sas: _infile_;

Basic code

 
data pdv01;
   infile cards;
   input subjid age  sex$ race$ trt$;
   agemon=age*12;
   cards;
1015 63 F WHITE Pbo
1023 64 M BLACK Pbo
1028 71 M WHITE Xan_Hi
1033 74 M WHITE Xan_Lo
1034 77 F ASIAN Xan_Hi
1047 85 F WHITE Pbo
;
run;

usage of put statement

 
data put01;
   put "This is the first line in log with put statement";
   put "This is the second line in log with put statement";
   name="CSG";
   put "*******************************************my asterisks";
   put ;
   put "We mention the name of the variable to see the value present in it in the log";
   put ;
   put "My Variable is 'name' and the value in it is : " name;
   put "**** " name " ****";
   put "****" name "****";
run;

Notice the usage of keyword '_all_', which is used to display all the variables' values in log

data put02;
   name="CSG";
   site="mycsg.in";
   put _all_;
run;
 
data put03;
   set pdv01;
   put _all_;
run;

Single put statement: after agemon variable

 
data pdv02;
   infile cards;
   input subjid age  sex$ race$ trt$;
   agemon=age*12;
   put "After Creating agemon variable: " _all_ /;
   cards;
1015 63 F WHITE Pbo
1023 64 M BLACK Pbo
1028 71 M WHITE Xan_Hi
1033 74 M WHITE Xan_Lo
1034 77 F ASIAN Xan_Hi
1047 85 F WHITE Pbo
;
run;

Single put statement: before agemon variable;
notice that agemon variable has a missing value in log file;

 
data pdv02;
   infile cards;
   input subjid age  sex$ race$ trt$;
 
   put "Before Creating agemon variable: " _all_ /;
 
   agemon=age*12;
   cards;
1015 63 F WHITE Pbo
1023 64 M BLACK Pbo
1028 71 M WHITE Xan_Hi
1033 74 M WHITE Xan_Lo
1034 77 F ASIAN Xan_Hi
1047 85 F WHITE Pbo
;
run;

Two put statements: before and after agemon variable;
notice that agemon variable has a missing value in log file in 'before' put but has a value in 'after' put statement;

 
data pdv02;
   infile cards;
   input subjid age  sex$ race$ trt$;
 
   put "Before Creating agemon variable: " _all_ /;
   agemon=age*12;
   put "After Creating agemon variable: " _all_ /;
 
   cards;
1015 63 F WHITE Pbo
1023 64 M BLACK Pbo
1028 71 M WHITE Xan_Hi
1033 74 M WHITE Xan_Lo
1034 77 F ASIAN Xan_Hi
1047 85 F WHITE Pbo
;
run;

Two put statements: before input and after agemon variable;
notice that agemon variable has a missing value in log file in 'before' put but has a value in 'after' put statement;

 
data pdv02;
   infile cards;
 
   put "Before input statment: " _all_ /;
   input subjid age  sex$ race$ trt$;
   agemon=age*12;
   put "After Creating agemon variable: " _all_ /;
 
   cards;
1015 63 F WHITE Pbo
1023 64 M BLACK Pbo
1028 71 M WHITE Xan_Hi
1033 74 M WHITE Xan_Lo
1034 77 F ASIAN Xan_Hi
1047 85 F WHITE Pbo
;
run;

Three put statements: before input, after input and after agemon variable;
notice that agemon variable has a missing value in log file in 'before' put but has a value in 'after' put statement;

data pdv02;
   infile cards;
 
   put "Before input statment: " _all_ ;
   input subjid age  sex$ race$ trt$;
   put "After input statment: " _all_ ;
 
   agemon=age*12;
   put "After Creating agemon variable: " _all_ /;
 
   cards;
1015 63 F WHITE Pbo
1023 64 M BLACK Pbo
1028 71 M WHITE Xan_Hi
1033 74 M WHITE Xan_Lo
1034 77 F ASIAN Xan_Hi
1047 85 F WHITE Pbo
;
run;

data pdv02; infile cards; put "Before input statment: " _all_ /; input subjid age sex$; put "After input statment: " _all_ ; agemon=age*12; put "After Creating agemon variable: " _all_ /; cards; 1015 63 F 1023 64 M 1028 71 M ; run;

*Copyright @ www.mycsg.in;

Preparatory steps

*null value representation in sas for character and numeric variables; *two automatic variables in sas: _error_ and _n_; *Another automatic variable in sas: _infile_;

Basic code

usage of put statement

Notice the usage of keyword '_all_', which is used to display all the variables' values in log

Single put statement: after agemon variable

*Single put statement: before agemon variable; *notice that agemon variable has a missing value in log file;

*Two put statements: before and after agemon variable; *notice that agemon variable has a missing value in log file in 'before' put but has a value in 'after' put statement;

*Two put statements: before input and after agemon variable; *notice that agemon variable has a missing value in log file in 'before' put but has a value in 'after' put statement;

*Three put statements: before input, after input and after agemon variable; *notice that agemon variable has a missing value in log file in 'before' put but has a value in 'after' put statement;

null value representation in sas for character and numeric variables;
two automatic variables in sas: _error_ and _n_;
*Another automatic variable in sas: _infile_;

Single put statement: before agemon variable;
notice that agemon variable has a missing value in log file;

Two put statements: before and after agemon variable;
notice that agemon variable has a missing value in log file in 'before' put but has a value in 'after' put statement;

Two put statements: before input and after agemon variable;
notice that agemon variable has a missing value in log file in 'before' put but has a value in 'after' put statement;

Three put statements: before input, after input and after agemon variable;
notice that agemon variable has a missing value in log file in 'before' put but has a value in 'after' put statement;