Tito de Morais Luis <[EMAIL PROTECTED]> writes:
> Dear listers,
>
> The following command (derived from the example in the ?stars help page)
> works :
>
> data(mtcars)
> stars(mtcars[, 1:7])
>
> But the following gives an error:
> stars(mtcars[1, 1:7])
> Error in s.y[i, ] : incorrect number of dimensions
>
> I was expecting to have the star graph for the first line (Mazda Rx4)
I don't think that makes sense. Star graphs are only defined for an
ensemble of rowss, at least with the default setting of 'scale=TRUE'.
> The following give an incorrect graph for the first two cars :
> stars(mtcars[1:2, 1:7])
Looks correct to me. 1st two models are identical on five variables,
and the remaining two are scaled to [0,1], which in this case means
that you get two zeros for the first car and two ones for the other.
> The following gives the correct graphs for all cars:
> stars(mtcars[1:32, 1:7])
>
> How can I have correct graphs for a selection of lines ?
First define "correct". You can use scale=FALSE and do the scaling
yourself in some way that is independent of the subset chosen.
--
O__ Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907
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