Message-ID: <42396ED0.3020104@statistik.uni-dortmund.de>
Date: 2005-03-17T11:49:36Z
From: Uwe Ligges
Subject: error in solve_technical question
In-Reply-To: <42395FEC.1030303@bordeaux.inra.fr>
Jonathan Charrier wrote:
> Hi everybody,
>
> it's a technical question .
>
> i have a matrix with 30 columns and 40000 rows,
> i start my program and i found this error:
>
> "error in solve.default(sBB + Z[,,i] %*% Gamma %*% t(Z[,,i])):
> system is computationally singular: reciprocal condition number =
> 7.6377e-018 "
>
> is it R limit?
Well, if the system is computationally (=almost) singular, so it is very
dangeraous to do any computations: your solution can be ways off. You
are protected against interpreting unsensible results.
Uwe Ligges
>
> thanks a lot.
>
> Jonathan Charrier
>
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