R help - Jun 2012 - Error in if (rank) { : argument is not interpretable as logical

Hello all,

I am running the function "rda" of the vegan library, like I did many
times without having troubles, and I get the following error message:
"Error in if (rank) { : argument is not interpretable as logical".

I am just testing a response matrix against a single explanatory
matrix, which is the result of a model matrix with 4 dummy variables
(coding for a factor of 5 levels).

myrda<-rda(resp, expl)

When I change the response matrix, it goes well.

Does anyone know what might be happening?

Thanks,

Duarte

On 11.06.2012 17:47, Duarte Viana wrote:
> Hello all,
>
> I am running the function "rda" of the vegan library, like I did
many
> times without having troubles, and I get the following error message:
> "Error in if (rank) { : argument is not interpretable as
logical".
>
> I am just testing a response matrix against a single explanatory
> matrix, which is the result of a model matrix with 4 dummy variables
> (coding for a factor of 5 levels).
>
> myrda<-rda(resp, expl)
>
> When I change the response matrix, it goes well.
>
> Does anyone know what might be happening?
Not without reproducible examples nor a traceback() of the error message.

Uwe Ligges

> Thanks,
>
> Duarte
>
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