[R] sequential processing

From: Gerard Smits <g_smits_at_verizon.net>
Date: Sun 21 Jan 2007 - 19:22:07 GMT


Like many others, I am new to R but old to SAS.

Am I correct in understanding that R processes a data frame in a sequential ly? This would imply that large input files could be read, without the need to load the entire file into memory. Related to the manner of reading a frame, I have been looking for the equivalent of SAS _n_ (I realize that I can use a variant of which to identify an index value) as well as useful SAS features such as first., last., retain, etc. Any help with this conversion appreciated.

Thanks,

Gerard Smits



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