cor(x, y=x, use="all.obs") cov(x, y=x, use="all.obs")
x
| a matrix or data frame. |
y
| a matrix or data frame. |
use
|
a character string giving the method for handling
missing observations. This must be one of the stringss
"all.obs", "complete.obs" or "pairwise.complete.obs"
(abbreviations are acceptable).
|
x and the columns of y.
If use has the value "all.obs", then the presence
of missing observations will cause the computation to fail.
If use has the value "complete.obs" then missing values
are handled by casewise deletion. Finally, if use has the
value "pairwise.complete.obs" then the correlation between
each pair of variables is computed using all complete pairs
of observations on those variables.
This can result in correlation matrices which are not
positive semidefinite.