a list of variables names you want to include, if NULL all available
variables are included.
...
passed to called methods (not currently used)
Value
A data frame with the row names as vars and the column as cor.
Details
The correlations are computed using cor.yai. For data imputation, such
correlations are likely not appropriate (Stage and Crookston 2007).
References
Stage, A.R.; Crookston, N.L. (2007). Partitioning error components
for accuracy-assessment of near neighbor methods of imputation.
For. Sci. 53(1):62-72.
http://www.fs.fed.us/rm/pubs_other/rmrs_2007_stage_a001.pdf