This 'strange behaviour' manifest itself within some quite complex
code. When I created a *very* simple example the behaviour dissapeared.
Here is the simplest version I have found which still causes the strange
behaviour (it could be quite unrelated to the boot library, however).
There's something peculiar that I do not understand here. However, did you
realize that the thing you are assigning into parts of `a' is NULL? Check
you're my.test.boot.ci.1: It's NULL.
Be that as it may, I get:
a - data.frame(matrix(1:4, nrow=2), X3=NA, X4=NA)
a
X1 X2 X3 X4
1 1 3 NA NA
This seems to have more to do with NULLs than NAs. For instance:
a - data.frame(matrix(1:8, nrow=2))
a
X1 X2 X3 X4
1 1 3 5 7
2 2 4 6 8
a[a$X2 == 4,]$X1 - NULL
a
X1 X2 X3 X4
1 1 3 5 7
2 4 6 8 4
James
On 8/06/2005 7:15 a.m., Liaw, Andy wrote:
There's something peculiar
