getH: Returns the derivation history of an edit matrix or array
Description
Function eliminate
tracks the history of
edits in a logical array H. H has nrow(E) rows and the
number of columns is the number of edits in the
editmatrix
as it was first defined. If
H[i,j1], H[i,j2],...,H[i,jn] are TRUE
, then E[i,]
is some (positive, linear) combination of original edits
E[j1,], E[j2,],...,E[jn,]
h records the number of variables eliminated from E by
eliminate
Details
Attributes H and h are used to detect redundant derived
edits.