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Data Transfer: Special Values<br />
� R‘s special values<br />
– NULL, NaN, -Inf, Inf, NA<br />
� representation in VARIANT<br />
– VARIANT type VT_ERROR<br />
– compatible with Microsoft Excel‘s representation<br />
R Value<br />
NULL<br />
NaN<br />
-Inf<br />
Inf<br />
NA<br />
converts to<br />
xlErrNULL<br />
xlErrDiv0<br />
xlErrDiv0<br />
xlErrDiv0<br />
xlErrNA<br />
back to R<br />
NULL<br />
– NaN will become xlErrNum in next major release of R<br />
Inf<br />
Inf<br />
Inf<br />
NA