Answer Posted / veerendar alugola

you can see the below example for a-z:

data ptcde;
input ptid $ test1 test2 test3 test4;
cards;
1102 56 65 66 70
1103 55 85 62 77
1104 85 71 59 66
1105 55 100 120 61
1106 90 58 65 63
;
run;

data abc;
set ptcde;
a=mean(of test1-test4);
run;

when you use a-z it will consider only the range variables.


You can find the below example for a--z;

data ptcde;
input ptid $ test1 abc def test4;
cards;
1102 56 65 66 70
1103 55 85 62 77
1104 85 71 59 66
1105 55 100 120 61
1106 90 58 65 63
;
run;

data abc;
set ptcde;
a=mean(of test1--test4);
run;

when you use a--z it will consider all the variables
irrespective of the series.

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