I suspect that Dr. Jim is conflating the behavior of R w.r.t.
arguments in a function call (where assignment to one argument can be
"seen" by another argument) with the behavior of naming items in a
list expression.
--
David.
On Oct 20, 2010, at 11:01 AM, jim holtman wrote:
I do not see that it has been "created" yet. You my have defined it
earlier in the 'list' expression, but as an object it is not available
yet. You might have to do something like uwing 'within'
x <- list()
x <- within(x, {
+ a = 1:10
+ b = 11:20
+ c = a + b
+ d = a * b})
x
$d
[1] 11 24 39 56 75 96 119 144 171 200
$c
[1] 12 14 16 18 20 22 24 26 28 30
$b
[1] 11 12 13 14 15 16 17 18 19 20
$a
[1] 1 2 3 4 5 6 7 8 9 10
On Wed, Oct 20, 2010 at 10:42 AM, Maas James Dr (MED) <j.m...@uea.ac.uk
> wrote:
I can not understand why this fails
faicoutput2 <- list(stuff21 = as.numeric(faicout$coefficients[2]),
+ stuff31=as.numeric(faicout$coefficients[3]),
+ stuff41=as.numeric(faicout$coefficients[4]),
+ stuff32=(stuff21-stuff31),
+ stuff42=(stuff21-stuff41),
+ stuff43=(stuff32-stuff42)
+ )
Error: object 'stuff21' not found
Why does it have to be found, exist previously ... it is being
created?
But this works fine ....
data <- list(Ntrials =numtritot, Ncomparisons=2,
treat=c(rep(1 ,N.trials[1,2]), rep(2,N.trials[1,3])),
total.patientnums.trt1=dat2[ ,2],
total.patientnums.trt23=dat2[ ,2],
num.countstrt1=dat2[ ,5],
num.countstrt23=dat2[ ,6] )
.... ????
===============================
Dr. Jim Maas
David Winsemius, MD
West Hartford, CT
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