On Aug 8, 2012, at 8:43 AM, aleksandr russell wrote:
Hi again,
Thanks for your suggestion.
I think I can clarify the thing by looking at the bare bones:
data11 = array(0,c(41,2,2))
m8<-cbind(.29,1:41)
m9<-as.array(m8,dim=c(41,2))
data11[,1,]=m9
data11[,2,]=m9
varnames=c("V","R")
colnames(data11)=c("one","two")
> colnames(data11)=c("one","two"); str(data11)
num [1:41, 1:2, 1:2] 0.29 0.29 0.29 0.29 0.29 0.29 0.29 0.29 0.29
0.29 ...
- attr(*, "dimnames")=List of 3
..$ : NULL
..$ : chr [1:2] "one" "two"
..$ : NULL
dimnames(data11)=list(rownames(data11),varnames,colnames(data11))
data11a<-as.array(data11,dimnames=dimnames(data11))
> str(data11)
num [1:41, 1:2, 1:2] 0.29 0.29 0.29 0.29 0.29 0.29 0.29 0.29 0.29
0.29 ...
- attr(*, "dimnames")=List of 3
..$ : NULL
..$ : chr [1:2] "V" "R"
..$ : chr [1:2] "one" "two"
Dimnames is a list with three lists.
Just running the above, some artificial data, I come out with
an array that seems to be have the right attributes: typing
"attributes(data11a)" I get dimnames for each dimension.
The problem is that [package 'colloc infer' says]
(and I quote):
Error in `colnames<-`(`*tmp*`, value = c("V", "R")) :
length of 'dimnames' [2] not equal to array extent
You are not offering code and data that would help understand the
problem.
It seems that the names for the second dimension of the array must
have length of 2 -- rather than the present "1" for the analysis to
work.
Again, typing
length(dimnames(data11a)[2])
I get
[1] 1
I've tried your suggestion for the dimnames but I'm getting an error
"could not find function paste0"
Maybe you're using R later than 2.41?
Yes. R 2.15.1 has added paste0() which is basically paste(... , sep="").
--
thanks,
Alexander
On Wed, Aug 8, 2012 at 10:52 AM, David Winsemius <dwinsem...@comcast.net
> wrote:
On Aug 8, 2012, at 3:19 AM, aleksandr russell wrote:
Hello,
I'm working with an array; I'm trying to make it so that an array of
dim(42,2,2) has names whose length corresponds to that of the array,
and am hoping someone with experience with this can see what I'm not
doing correctly:
data11 = array(0,c(41,2,2))
y = lsoda(x0,times,fhn$fn.ode,pars)#This is make.fhn() from colloc
infer package#
y = y[,2:3]
data11<-array(0,c(41,2,2))
m8<-cbind(.29,1:41)
m9<-as.array(m8,dim=c(41,2))
data11[,1,] = y+m9
data11[,2,] = y+m9
I didn't run that code since your difficulties did not seem to have
anything
to do with the values inside the array but only with the dimension
labeling.
rownames(data2, do.NULL = FALSE, prefix="row")
What is 'data2'?
varnames=c("V","R")
colnames(data6)=c("one","two")
Ditto... what is 'data6'?
colnames(data10)=colnames(data6)
dimnames(data11)=list(rownames(data2),varnames,colnames(data10))
data11a<-as.array(data11,dimnames=dimnames(data11))
attributes(data11a)
#so this seems to print out the array attributes as they
should be:
For which object?
two sets of two columns each, and the first column of
each set is called 'v' and the second 'r'- no problem#
The data11 object had three dimenstions.
now the analysis from colloc infer(I've put it in below*)
takes this array but will not complete the analysis, saying
"Error in `colnames<-`(`*tmp*`, value = c("V", "R")) :
length of 'dimnames' [2] not equal to array extent"
Here's one way to label a 41 x 2 x 2 array:
dimnames(data11)<- c(list(X=paste0("X",1:41)), list(Y=paste0("Y",
1:2)),
list(Z=paste0("Z",1:2)) )
attributes(data11)
$dim
[1] 41 2 2
$dimnames
$dimnames$X
[1] "X1" "X2" "X3" "X4" "X5" "X6" "X7" "X8" "X9" "X10"
"X11" "X12"
"X13" "X14" "X15" "X16" "X17" "X18" "X19"
[20] "X20" "X21" "X22" "X23" "X24" "X25" "X26" "X27" "X28" "X29"
"X30" "X31"
"X32" "X33" "X34" "X35" "X36" "X37" "X38"
[39] "X39" "X40" "X41"
$dimnames$Y
[1] "Y1" "Y2"
$dimnames$Z
[1] "Z1" "Z2"
When I type in
length(dimnames(data11a)[2])
I get the answer:
[1] 1
which seems odd when
dimnames(data11a)[2]
gives
[[1]]
[1] "V" "R"
It is a one element list whose single element is a 2 element vector.
I would like to ask "How can I get the names of the second dimension
of the array(data11a) to have length "2" ?
It seems to me that the analysis will run if I can make this array
have the correct length dimnames
I thank you for your help.
____________
*
David Winsemius, MD
Alameda, CA, USA
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