Added an Authors@R field to DESCRIPTION
(replacing the old Author/ Maintainer fields),
as requested by CRAN following a change in their incoming
checks.
tca() now fixes the sign of each computed axis
instead of leaving it to whatever an underlying eigen/SVD-type step
happens to return. Axis row/column scores are only ever defined up to a
sign, and different BLAS/LAPACK backends (e.g. BLIS vs reference BLAS)
can legitimately return either sign for the same axis; this had no
effect on the correctness of results but made them depend on the
platform’s linear algebra backend, which CRAN’s additional BLIS checks
flagged as test failures. tca() now makes the
largest-magnitude entry (row or column) of each axis positive, a
convention that does not depend on whether the input matrix was
transposed internally.
Note for existing users: since the previous sign for
a given axis was arbitrary (backend-dependent), this change may flip the
displayed sign of some axes compared to earlier versions/sessions. This
does not change any distances, dispersions, or the interpretation of
tca() results (Taxicab correspondence analysis axes are
sign-invariant) — only which direction is plotted/printed as
positive.