[R] corrupted matrix data.. sporadic result appears to be pairs of decimal numbers glommed together

[jim holtman]

Those appear to be complex numbers; some place in your script you must
be computing something that return a complex number.  Do an str on the
matrix to see what it says; see if it says this:

> x.1
                     [,1]                 [,2]
[1,] 0.1820848-0.0000032i 0.1820848-0.0000032i
[2,] 0.1820848-0.0000032i 0.1820848-0.0000032i
> str(x.1)
 cplx [1:2, 1:2] 0.182-0i 0.182-0i 0.182-0i ...
>

If it does, look closely at your script.



On Thu, Dec 3, 2009 at 2:54 PM, Stephen Grubb <Stephen.Grubb at jax.org> wrote:
> Hello,
>
> We are occasionally getting matrix results that appear to be corrupted... here are the last several rows of an example.  These are supposed to be floating point numbers.
>
> [25015,]  1.820848e-01-3.2090e-06i
> [25016,]  2.178046e-01-4.8140e-06i
> [25017,]  1.820848e-01-3.2090e-06i
> [25018,]  1.820848e-01-3.2090e-06i
> [25019,]  1.144594e-01-1.6657e-06i
> [25020,]  1.820848e-01-3.2090e-06i
> [25021,] -1.293271e-01+4.3889e-06i
> [25022,]  1.144594e-01-1.6657e-06i
> [25023,]  1.820848e-01-3.2090e-06i
> [25024,]  1.820848e-01-3.2090e-06i
> [25025,]  1.173487e-01-4.4415e-07i
> [25026,]  1.820848e-01-3.2090e-06i
> [25027,]  1.375304e-01-3.6167e-06i
> [25028,]  1.820848e-01-3.2090e-06i
> [25029,] -1.293271e-01+4.3889e-06i
> [25030,]  1.820848e-01-3.2090e-06i
> [25031,]  1.820848e-01-3.2090e-06i
> [25032,]  1.820848e-01-3.2090e-06i
> [25033,]  1.820848e-01-3.2090e-06i
>
> Any general idea what may be going on here?
>
> It is a sporadic problem... it occurs maybe 2% or 3% of the time when running this particular script on various data.
>
> I apologize for not including a pared-down example that reproduces the problem.... we are using an R script written elsewhere on large data sets.  If someone wants more specifics please follow up.
>
> Steve Grubb
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?