## Variable Combination Count

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Posts: 17

# Variable Combination Count

Hi Everyone I have come across an issue that I was hoping someone could help me solve. I have a data set with 120 observations. I would like to see how many times various combinations of five variables present themselves within the data. According to my calculations there are 31 possible unique combinations of the 5 variables. What I would like to see is how many times each of these 31 combinations are present within these 120 observations. A table of the possible combinations is listed with the 5 variables represented as A, B, C, D, and E.  Any help would be greatly appreciated!

Accepted Solutions
Solution
‎12-21-2015 03:54 PM
Super User
Posts: 6,935

## Re: Variable Combination Count

This should do it:

proc freq data=have;

tables a * b * c * d * e / missing list;

run;

The number of combinations of values could be much larger depending on what values your variables take on.  But you'll see that soon enough.

Good luck.

All Replies
Super User
Posts: 24,018

## Re: Variable Combination Count

What does your data actually look like? You can calculate the number of combinations via the comb() function.

data have;
do i=1 to 5;
x=comb(5,i);
y=sum(x,y);
output;
end;
run;

proc print data=have;run;

Counting the instances may be as simple as a proc freq.
Solution
‎12-21-2015 03:54 PM
Super User
Posts: 6,935

## Re: Variable Combination Count

This should do it:

proc freq data=have;

tables a * b * c * d * e / missing list;

run;

The number of combinations of values could be much larger depending on what values your variables take on.  But you'll see that soon enough.

Good luck.

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