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Sanscrit_2prov
Obsidian | Level 7

Hi:

In SAS IML there is a function called ALLCOMB that can create a matrix of all possible combinations. This is a very helpful function but if the number of combinations is for n=large it doesn't work as well from an efficiency point of view. I was wondering if any one has created hash tables of all possible combinations to improve the efficiency. I know how to either use allcomb or do loops to create a matrix but instead I would like to create a Hash table lookup of the combinations in each row. Thanks   

2 REPLIES 2
PeterClemmensen
Tourmaline | Level 20

@Sanscrit_2prov welcome to the SAS Community 🙂 

 

Can you provide a small example of your problem and where it goes wrong?

Ksharp
Super User

Check GRAYCODE Function  in data step.

I would not think Hash could contain so many combinations. and it must be exploded .

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