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lowertriangle
2007 Apr 23
1
how to convert the lower triangle of a matrix to a symmetricmatrix
Sorry if this answer was already given, or if I miss the point,
but did you have a look to "lowerTriangle" and "upperTriangle" functions
in the "gdata" package ?
# example
# A<-matrix(rnorm(9),3,3)
# B<-B<-matrix(NA,dim(A)[1],dim(A)[2])
# lowerTriangle(B)<-lowerTriangle(A)
# upperTriangle(B)<-lowerTriangle(A)
# diag(B)<-diag(A)
Hope this helps,