On Jun 20, 2011, at 5:00 AM, mdvaan wrote:
#Hi list,
#From the code below I get two list objects (n$values and n$vectors):
One of which is a numeric vector and the other of which is a matrix.
dat <- matrix(1:9,3)
n<-eigen(dat)
n
# How do I add another object to n that replicates n$vectors and is
called
n$vectors$test?
# Thanks a lot!
Maybe you should explain what your goal is. At the moment n$vectors is
not a list but rather a matrix. As such assignment of <anything> to n
$vectors$test will result in coercion of the matrix elements to
individual list elements, as you should have seen from the warning
message when you tried the obvious.
> n$vectors$test <- n$vectors
Warning message:
In n$vectors$test <- n$vectors : Coercing LHS to a list
> n
$values
[1] 1.611684e+01 -1.116844e+00 -5.700691e-16
$vectors
$vectors[[1]]
[1] -0.4645473
$vectors[[2]]
[1] -0.5707955
$vectors[[3]]
[1] -0.6770438
$vectors[[4]]
[1] -0.882906
$vectors[[5]]
[1] -0.2395204
$vectors[[6]]
[1] 0.4038651
$vectors[[7]]
[1] 0.4082483
$vectors[[8]]
[1] -0.8164966
$vectors[[9]]
[1] 0.4082483
$vectors$test
[,1] [,2] [,3]
[1,] -0.4645473 -0.8829060 0.4082483
[2,] -0.5707955 -0.2395204 -0.8164966
[3,] -0.6770438 0.4038651 0.4082483
So the tenth element of n$vectors (which is now of a different class)
will be the desired result but you have 9 list elements that were the
original matrix values
> n$vectors[[10]]
[,1] [,2] [,3]
[1,] -0.4645473 -0.8829060 0.4082483
[2,] -0.5707955 -0.2395204 -0.8164966
[3,] -0.6770438 0.4038651 0.4082483
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David Winsemius, MD
West Hartford, CT
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