Diff in Arrays

[Ravikumarpa4]

hi how to find diiference for below data using arrays

need diff between qtr1-qtr1n.. so on..

Obs id qtr1 qtr2 qtr3 qtr4 Qtr1n Qtr2n Qtr3n Qtr4n i 1 2 3

102	50	100	150	200	62.5	125.0	187.5	250	5
104	60	100	120	180	75.0	125.0	150.0	225	5
106	80	130	160	220	100.0	162.5	200.0	275	5

[PeterClemmensen]

How do you want the differences presentes? In seperate columns? 🙂

[Ravikumarpa4]

yes same as qtr1m qtr2m qtr3m qtr4m

[RW9]

Post test data in the form of a datastep, we are not here for data entry!

Something like:

data want;
  set have;
  array qtr{4};
  array qtr2{4} qtr1n qtr2n qtr3n qtr4n;
  array res{4};
  do i=1 to 4;
    res{i}=qtr2{i}-qtr{i};
  end;
run;

Why have you called array elements qtrXn, that just makes your programming harder, put the number at the end.

[Ravikumarpa4]

below is my original data set;

first I need increasing qtr value to 25% later i wanted difference between both by using arrays. kould you help on this

id qtr1 qtr2 qtr3 qtr4;

102 50 100 150 200

104 60 100 120 180

106 80 130 160 220

[Kurt_Bremser]

For those who have a hard time grasping the concept, this is how you post data in a data step:

data have;
input id qtr1 qtr2 qtr3 qtr4;
cards;
102 50 100 150 200
104 60 100 120 180
106 80 130 160 220
;
run;

Now all possible helpers only need a copy/paste and "run" to recreate your dataset. Be courteous to those who shall help you.

[Ravikumarpa4]

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Hi
That's I've done it already. Now I'm wanted increase values by 25% and
later I wanted find difference between both by using Arrays

Regards
Ravi

[RW9]

Something like (again, not typing in):

data want;
  set have;
  array qtr{4};
  array qtr2{4};
  array res{4};
  do i=1 to 4;
    qtr2{i}=1.25 * qtr{1};
    res{i}=qtr2{i}-qtr{i};
  end;
run;

However this doesn't make much sense as diff will always be 25% so why the need for the second set of variables at all, just do:

res{i}=(qtr{i} / 100) * 25;