1. Please post in plain text, not HTML (as the posting guide asks!) 2. This might actually be an R question -- is ?lower.tri what you want?
-- Bert On Tue, Nov 15, 2011 at 2:50 PM, Jeff Newmiller <jdnew...@dcn.davis.ca.us> wrote: > This is R-help, not the linear algebra hotline. Please stay on topic. > --------------------------------------------------------------------------- > Jeff Newmiller The ..... ..... Go Live... > DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go... > Live: OO#.. Dead: OO#.. Playing > Research Engineer (Solar/Batteries O.O#. #.O#. with > /Software/Embedded Controllers) .OO#. .OO#. rocks...1k > --------------------------------------------------------------------------- > Sent from my phone. Please excuse my brevity. > > Juliet Ndukum <jpnts...@yahoo.com> wrote: > >>Given a vector;> ab = seq(0.5,1, by=0.1)> ab[1] 0.5 0.6 0.7 0.8 0.9 1.0 >>The euclidean distance between the vector elements is given by the >>lower triangular matrix�> dd1 = dist(ab,"euclidean")> dd1� � 1 � 2 � 3 >>� 4 � 52 0.1 � � � � � � � �3 0.2 0.1 � � � � � �4 0.3 0.2 0.1 � � � �5 >>0.4 0.3 0.2 0.1 � �6 0.5 0.4 0.3 0.2 0.1 >>Convert the lower triangular matrix to a full matrix> ddm = >>as.matrix(dd1)> ddm� � 1 � 2 � 3 � 4 � 5 � 61 0.0 0.1 0.2 0.3 0.4 0.52 >>0.1 0.0 0.1 0.2 0.3 0.43 0.2 0.1 0.0 0.1 0.2 0.34 0.3 0.2 0.1 0.0 0.1 >>0.25 0.4 0.3 0.2 0.1 0.0 0.16 0.5 0.4 0.3 0.2 0.1 0.0 >>I would be grateful if someone could provide me with a code to convert >>ddm to the lower triangular matrix as before i.e. dd1 >> above. >>Your help will be greatly appreciated.JN >> [[alternative HTML version deleted]] >> >>______________________________________________ >>R-help@r-project.org mailing list >>https://stat.ethz.ch/mailman/listinfo/r-help >>PLEASE do read the posting guide >>http://www.R-project.org/posting-guide.html >>and provide commented, minimal, self-contained, reproducible code. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.