[R] lapply() reccursively

Kaveh Vakili kaveh.vakili at ulb.ac.be
Tue Oct 13 13:33:31 CEST 2009

Hi all,

I was wondering whether it is possible to use the lapply() function
to alter the value of the input, something in the spirit of :


Something akin to a for() loop, but using the lapply() infrastructure.
I haven't been able to get rapply() to do this.

The reason is that the "real" a2 function is a difficult function that only needs to be evaluated if the value of a1[i-1] meets some criteria.

Thanks in advance,

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