Description Objects from the Class Slots Extends Methods
The "SsdMatrix"
class is the class of symmetric, dense matrices
in packed storage (just as a dspMatrix-class
, i.e.,
only the upper triangle is stored) defined within the qpgraph
package to store corrected, or uncorrected, matrices of the sum of squares
and deviations (SSD) of pairs of random variables. A corrected SSD matrix
corresponds to a sample covariance matrix.
Objects can be created by calls of the form new("SsdMatrix", ...)
or by using qpCov()
which estimates a sample covariance
matrix from data returning an object of this class.
ssd
:Object of class dspMatrix-class
storing the SSD matrix.
n
:Object of class "numeric"
storing the sample
size employed to estimate the SSD matrix stored in the slot ssd
.
This is specially relevant when the SSD matrix was estimated from data
with missing values by using complete observations only, which is the
default mode of operation of qpCov()
.
"SsdMatrix"
extends class "dspMatrix"
, directly.
signature(x = "SsdMatrix")
signature(x = "SsdMatrix")
signature(object = "SsdMatrix")
signature(object = "SsdMatrix")
signature(object = "SsdMatrix", logarithm = "missing")
signature(object = "SsdMatrix", logarithm = "logical")
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