In {ggm} | R Documentation |
Finds the indicator matrix of the zeros of a matrix.
In(A)
A |
a matrix. |
The indicator matrix is a matrix of zeros and ones which has a zero
element iff the corresponding element of A
is (exactly) zero.
a matrix of the same dimensions as A
.
Giovanni M. Marchetti
Wermuth, N. & Cox, D.R. (2003). Joint response graphs and separation induced by triangular systems. Submitted and available at http://psystat.sowi.uni-mainz.de.
DAG
, inducedCovGraph
, inducedConGraph
## A simple way to find the overall induced coincentration graph ## The DAG on p. 198 of Cox & Wermuth (1996) A <- DAG(y1 ~ y2 + y3, y3 ~ y5, y4 ~ y5) In(crossprod(A))