R: Sort a multivariate data matrix according to patterns of...
mysort
R Documentation
Sort a multivariate data matrix according to patterns of missingness.
Description
mysort sorts a multivariate data matrix so that records with
identical patterns of missingness are adjacent to one another.
mysort is a private function used inside of mlest.
Usage
mysort(x)
Arguments
x
A multivariate data matrix. Rows correspond to individual
records and columns correspond to components of the multivariate vector.
Value
sorted.data
A matrix of the same size as x but with the
rows re-arranged so that records with identical patterns of
missingness are adjacent to one another.
freq
An integer vector giving the number of records in each
block of rows with a unique pattern of missingness. The first
element in freq counts the number of rows in the top block
of sorted.data, and so on.
providing 
.