[R] Error in doc of corresp?

[Agustin Lobo]

I think that there is a problem in the doc
of MASS function corresp:

man(corresp) states:

"...
Arguments:

       x: The function is generic, accepting various forms of the
          principal argument for specifying a two-way frequency table. 
          Currently accepted forms are matrices, data frames..."

Nevertheless,

> data(caith)
> caith            
       fair red medium dark black
blue    326  38    241  110     3
light   688 116    584  188     4
medium  343  84    909  412    26
dark     98  48    403  681    85
> is.data.frame(caith)
[1] TRUE
> as.matrix(caith)
       fair red medium dark black
blue    326  38    241  110     3
light   688 116    584  188     4
medium  343  84    909  412    26
dark     98  48    403  681    85
> corresp(as.matrix(caith))
Error in corresp.default(as.matrix(caith)) : 
        invalid table specification

While corresp(caith) works fine.

Is this an error in the doc or am I not
transforming into matrix in the right way?

Thanks

Dr. Agustin Lobo
Instituto de Ciencias de la Tierra (CSIC)
Lluis Sole Sabaris s/n
08028 Barcelona SPAIN
tel 34 93409 5410
fax 34 93411 0012
alobo at ija.csic.es


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