New Contributor
Posts: 2

# Can you help me please immediately

Hello,

I have this question " Create a new variable called project2 and add 10 points to the project grade of the following students A,B,C,D (keep the grades of other students same)"

Super User
Posts: 3,923

## Re: Can you help me please immediately

[ Edited ]

Something similar to this:

``if student in ('A', 'B', 'C') then grade = grade + 10;``

BTW, it would be helpful if you summarised your problem in the title rather than ask for help because that applies to most posters...

Perhaps something like: SAS Coding Question

SAS Employee
Posts: 24

## Re: Can you help me please immediately

I partially agree with SASKiwi's answer except that the grade variable will be over written and you asked for a new variable. Therefore I suggest:

``if student in ('A', 'B', 'C') then project2 = project + 10;``
Valued Guide
Posts: 765

## Re: Can you help me please immediately

Hi, another idea ...

data x;
datalines;
A 50 B 60 C 70 D 33
;

data y;
set x;
grade + 10*(student in ('A' 'B' 'C'));
run;

data set Y ...

1     A      60
2     B      70
3     C      80
4     D      33

Contributor
Posts: 66

## Re: Can you help me please immediately

Here is a slight variation of Mike's example. This one handles missing values.

``````data x;
datalines;
A 50
B 60
C .
D 33
;
run;

data y;
set x;
if student in ('A','B','C','D') then project2 = sum(grade, 10);
run;``````

Valued Guide
Posts: 765

## Re: Can you help me please immediately

Hi, the SUM statement also ignores mising values.

data x;
datalines;
A 50 B 60 C . D 33
;

data y;
set x;
grade + 10*(student in ('A' 'B' 'C'));
run;

data set Y ..

1    A      60
2    B      70
3    C      10
4    D      33

Contributor
Posts: 66

## Re: Can you help me please immediately

You are right ... the boolean statement student in ('A' 'B' 'C') evaluates to 1; thus, for student 'C', 1*10 = 10.

In short, the sum operator (+) used in conjunction with the product of a boolean result would result in a non-missing value.

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