There are 2 variables A and B, and I create variable C using + operator, variable D using sum
function and E using sum statement. What will be result?
I know the difference between "+" and SUM function.
"+": If there are any missing values it returns missing result.
SUM function: It doesn't consider missing values and averages the remaining data.
Some information about SUM statement is, it has default functionality as RETAIN statement.
I want to know how it is working. Can any one give me a scenario?
Thankyou!
@RAVI2000 wrote:
How can I explain the SUM statememt as?
It gives cumulative sum by retaining ?
It gives a cumulative sum by retaining. In the code below, it adds the value of X to the previous value of CUMULATIVE_SUM
data a;
input x;
cumulative_sum+x;
cards;
5
1
-7
12.4
;
A slight correction
SUM function: It doesn't consider missing values and averages the remaining data.
SUM function: It doesn't consider missing values and sums the remaining data.
Here a typical use of the SUM statement to create a running count and sum per group:
data want;
set have;
by id;
if first.id
then do;
count = 1;
sum_amount = amount;
end;
else do;
count + 1;
sum_amount + amount;
end;
run;
As the SUM statement implies a retain, no separate RETAIN is needed.
@RAVI2000 wrote:
How can I explain the SUM statememt as?
It gives cumulative sum by retaining ?
It gives a cumulative sum by retaining. In the code below, it adds the value of X to the previous value of CUMULATIVE_SUM
data a;
input x;
cumulative_sum+x;
cards;
5
1
-7
12.4
;
A slight correction
SUM function: It doesn't consider missing values and averages the remaining data.
SUM function: It doesn't consider missing values and sums the remaining data.
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