x
a numeric vector, an ordered factor, matrix or data frame. An ordered factor will be coerced to numeric.
y
NULL
(default) or a vector, an ordered factor, matrix or data frame with compatible dimensions to x.
An ordered factor will be coerced to numeric.
use
an optional character string giving a method for computing covariances in the presence of missing values.
This must be (an abbreviation of) one of the strings "everything"
, "all.obs"
, "complete.obs"
,
"na.or