On 11/16/2011 9:32 PM, Prof Brian Ripley wrote:
The failures are *not* minor. Please don't distribute an R linked to a
broken BLAS library. Those tests are not for fun: they came from real
errors on real problems.
Dear Brian,
I am reasonable sure that the cygwin blas library are fine, have
you any evidence that they are broken ?
The R test log just reports an issue handling NA that could be
related to cygwin difference to others platform.
I already noted similar difference on cygwin octave package.
Here is the log:
--------------------------------------------------
> ## PR#4582 %*% with NAs
> stopifnot(is.na(NA %*% 0), is.na(0 %*% NA))
> ## depended on the BLAS in use.
>
>
> ## found from fallback test in slam 0.1-15
> ## most likely indicates an inaedquate BLAS.
> x <- matrix(c(1, 0, NA, 1), 2, 2)
> y <- matrix(c(1, 0, 0, 2, 1, 0), 3, 2)
> (z <- tcrossprod(x, y))
[,1] [,2] [,3]
[1,] NA NA 0
[2,] 2 1 0
> stopifnot(identical(z, x %*% t(y)))
Error: identical(z, x %*% t(y)) is not TRUE
Execution halted
tests/reg-BLAS.Rout.fail (END)
--------------------------------------------------
Regards
Marco
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