Hello,
I have this dataset:
Year | Amount |
2016 | 1000 |
2017 | 2000 |
2018 | . |
2019 | . |
2020 | . |
2021 | . |
and I want to do a calculation on a row level because the output of the calculation in 2018 for example depends on the output from 2017 and so on. For simplicity let's say I want to add column (Expected), which will be = this year's Amount if this year's Amount is not Null, otherwise it will be the output of last years (Expected) * 0.05.
so it will be like this:
Year | Amount | Expected |
2016 | 1000 | 1000 |
2017 | 2000 | 2000 |
2018 | . | 100 |
2019 | . | 5 |
2020 | . | 0.25 |
2021 | . | 0.0125 |
data want;
set have;
retain expected;
if not missing(amount) then expected=amount;
else expected=expected*0.05;
run;
data want;
set have;
retain expected;
if not missing(amount) then expected=amount;
else expected=expected*0.05;
run;
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