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Best way to store multiple lists of different sizes?


I'm running a model which produces lists of different lengths after each
iteration, and I want to somehow store them so I can do calculations on the
lists after all the model runs are finished -- is there some sort of
variable that can handle this?  For instance:

Iteration 1:
A={1,2,3,4}
Iteration 2:
A={1,2}
Iteration 3:
A={1,2,3,4,5,6}

I'd like some sort of storage variable that is:

B={1,2,3,4},{1,2},{1,2,3,4,5,6}

So I can access the list doing this such as Length[B[[1,All]]] -> 4,
Length[B[[2,All]]] -> 2, etc...  Thoughts?

--j

-- 
Jonathan Greenberg
Graduate Group in Ecology, U.C. Davis
http://www.cstars.ucdavis.edu/~jongreen
http://www.cstars.ucdavis.edu
AIM: jgrn307 or jgrn3007
MSN: jgrn307 at msn.com or jgrn3007 at msn.com



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