[R] smart way to turn a vector into a matrix

[anna]

Hi Erik, what if I do some manipulations on the new list created with split
and I want to come back to its initial form?  I saw you have the unsplit
function but I get errors. What I am doing is that I use as the "f" function
as in the help the same initial f I used to split but I get the following
error:
Error in x[i] <- value[[j]] : replacement has length zero


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Anna Lippel
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