data WYNIK;
set sashelp.class;
where age GT 12;
/*where age GT 12 and name like 'A%';  */
LENGTH DWA $2;
DWA=Name;
LITERY = COUNTC(Name,'','V');
today = today();
drop today;

DATA_URODZENIA = intnx('year', today, -AGE, 'S');
format DATA_URODZENIA date9.;
if find(Name,'a','i') ge 1 then
        test=1;
    else
        test=0;

test2 = cats(name,'-',age,'-',sex);

random = age * floor(11 *ranuni(0));

run;

data Wynik2;
    do i=1 to obs;
    set sashelp.class nobs = obs;
    if mod(i,2) = 1 then output;
    end;
run;


proc sort data=sashelp.class out=wynik3;
by sex descending age;
run;

proc freq data=sashelp.class;
tables sex;
run;

proc means data=sashelp.class min max;
class sex;
var age;
run;

proc means data=sashelp.class mean;
class sex;
var age;
run;

data w;
set sashelp.air;

run;

data w;
set sashelp.air;
cum=sum(cum,air);
retain cum;
run;

data wynik;
set sashelp.class;
lagged=lag(sex);
run;
data wynik;
set wynik;
where lagged='F';
drop lagged;
run;

data w;
set sashelp.class;
suma=lag2(age) + lag1(age);
run;

data wynik;
set sashelp.class;
run;

data wynik;
set sashelp.class (firstobs=5 obs=7);
run;

data wynik;
set sashelp.class (obs=1);
run;

data wynik;
set sashelp.class end=eof;
if eof=1 then output;
run;

data w;
array t(20) wiek1-wiek20;
set sashelp.class;
do i=1 to 20;
if age=i then t(i)=1;
else t(i)=0;
end;
run;