I'm getting the impression from on-line docs that R cannot work with
single-precision floating-point numbers, but that it has a pseudo-mode for
single precision for communication with external programs.
I don't mind that R is using doubles internally, but what about storage?
If all I need to store is single-precision (32-bit), can I do that? When
it is read back into R it can be converted from single to double (back to
64-bit).
Furthermore, the data are numbers from 0.000 to 2.000 with no missing
values that could be stored just as accurately as unsigned 16-bit integers
from 0 to 2000. That would be the best plan for me.
It looks like the ff package allows for additional formats, so I might try
to use ff, but I still would like to get a better understanding of R's
native capabilities in regard to representations of numbers both in RAM
and in stored data files.
Thanks in advance.
Best,
Mike
--
Michael B. Miller, Ph.D.
Minnesota Center for Twin and Family Research
Department of Psychology
University of Minnesota
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