[R] write.table() with "numeric" and "complex" data

[ripley@stats.ox.ac.uk]

On Thu, 16 Jan 2003, Cyril Humbert wrote:

> write.table() seems to write "numeric" data as "complex"
> if one column of the data.frame is "complex". Is it a
> way to avoid this ?

Comment the line x <- as.matrix(x) in write.table.

>
> For example:
>
> > df <- data.frame(x=c(1,2), z=c(1i+1, 2i+2))
> > df
> 	  x    z
> 	1 1 1+1i
> 	2 2 2+2i
>
> > mode(df$x)
> 	[1] "numeric"
>
> > write.table(df, file="aa.dat")
> > df<-read.table("aa.dat", header=TRUE)
> > df
> 	     x    z
> 	1 1+0i 1+1i
> 	2 2+0i 2+2i
>
> > mode(df$x)
> 	[1] "complex"
>
> > version
> 	platform i386-pc-linux-gnu
> 	major    1
> 	minor    6.2
>
>
> Thanks
>
> --
> Cyril
>
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>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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