Dear all,
When trying to multiply the same matrices repeatedly I get different
results some of the times.
It is not systematic, which is the fact that is giving me more trouble to
try to isolate the problem.
Basically I am doing X %*% B, where X is a Nx2 matrix and B is a vector
with 2 values.
I cannot replicate this on, even with 1 milllion reps on:
R version 2.13.1 (2011-07-08)
Platform: i386-pc-mingw32/i386 (32-bit)
or
R Under development (unstable) (2011-08-13 r56733)
Platform: x86_64-pc-mingw32/x64 (64-bit)
Perhaps it is OS dependent (I am away from my linux box at the moment)?
Joshua Wiley vas escriure el dia dt, 13 set 2011:
I cannot replicate this on, even with 1 milllion reps on:
R version 2.13.1 (2011-07-08)
Platform: i386-pc-mingw32/i386 (32-bit)
or
R Under development (unstable) (2011-08-13 r56733)
Platform: x86_64-pc-mingw32/x64 (64-bit)
Perhaps
I tried your example code on my laptop running Ubuntu Linux,
and of course it ran --- just as it should (*has* to!) without any
problem; no errors thrown.
This sort of thing should not/does not/cannot happen under
``normal circumstances''. There has to be something wrong
somewhere in your
Rolf Turner vas escriure el dia dt, 13 set 2011:
I tried your example code on my laptop running Ubuntu Linux,
and of course it ran --- just as it should (*has* to!) without any
problem; no errors thrown.
This sort of thing should not/does not/cannot happen under
``normal circumstances''.
Xavier Fernández i Marín xfim.ll at gmail.com writes:
Rolf Turner vas escriure el dia dt, 13 set 2011:
[snip]
This sort of thing should not/does not/cannot happen under
``normal circumstances''. There has to be something wrong
somewhere in your setup. Either your hardware or your
Xavier Fernández i Marín xfim.ll at gmail.com writes:
More elements: In python the same algorithm does not show this strange
behaviour.
Is Python using the same BLAS/LAPACK?
__
R-help@r-project.org mailing list
Ben Bolker vas escriure el dia dt, 13 set 2011:
You mentioned that you had compiled R yourself.
Can you replicate this with a stock R binary, i.e. from a
Red Hat or Ubuntu repository? If not, can you give details of
your compilation setup, especially if you are using a specialized
or
8 matches
Mail list logo