I'm moving this part of an on-going discussion to r-devel because I think
I've
uncovered a bug:
>summary.default : How is yours different from R's (I didn't try to
find out)
> If it has an advantage you should post to R-devel as a proposal
I did propose it along time ago, but ... The fix was for a bug that Splus 3.2
and 3.3 have. It does not work properly with lists having an object with class
length greater than 1. I reported it to StatSci and it was suppose to get fixed
in 3.3 but didn't. I'm not sure about later versions. Having now just
checked R,
I see that R's summary.default has been changed. But the problem does not
occur
because another more serious incompatibility occurs first:
z <- 1:3
class(z) <- c("a", "b")
is.recursive(list(z, a=list(1:3)) )
R64.2:> [1] FALSE
Splus3.3> [1] T
My change to summary.default was to fix the following warning in Splus3.2 and
3.3:
> summary.default(list(z, a=list(1:3)))
Length Class Mode
3 a numeric
a 1 list
Warning messages:
Replacement length not a multiple of number of elements to replace in: sumry[
i, 2] <- class(ii)
and consisted simply of changing
sumry[i, 2] <- if (is.object(ii))
class(ii)
to
sumry[i, 2] <- if (is.object(ii))
paste(class(ii), collapse=" ")
This may not be necessary in the current R version, but because of the above
error in is.recursive, that part of summary.default is not used now.
Paul Gilbert
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