[R] decompose a correlation matrix

Mark Strivens strivens at bcm.tmc.edu
Thu Sep 23 20:08:53 CEST 2004

Is there a simple way to decompose the upper triangle
of a correlation matrix to a linear list;

For example:

  X Y Z
X 1 2 3
Y 2 1 4
Z 3 4 1

so you get a list like:

xy 2
XZ 3
YZ 4

I suspect you can do it with a matrix transformation, but
that beyond me at present.

Many thanks

Department of Molecular and Human Genetics,
Baylor College of Medicine,

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