chol() dimnames

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Subject: chol() dimnames
From: Jonathan Rougier (J.C.Rougier@durham.ac.uk)
Date: Mon 27 Sep 1999 - 20:18:52 EST


Message-ID: <Pine.GSO.3.96.990927110820.382H-100000@laplace>

Hi Everyone,

Just a minor point, but could chol() be changed to include the dimnames of
the original matrix? This will ensure that x and t(R) %*% R have the same
dimnames, where R <- chol(x). So we just need to insert

    if (!is.null(dx <- dimnames(x)))
        dimnames(z$v) <- dx

ahead of the return. Cheers, Jonathan.

Jonathan Rougier Science Laboratories
Department of Mathematical Sciences South Road
University of Durham Durham DH1 3LE

"[B]egin upon the precept ... that the things we see are to be
 weighed in the scale with what we know" (Meredith, 1879, The Egoist)

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