Re: [R] match lists
Try this: A <- list(matrix(c(2,3,3,1,2,2), 3, dimnames = list(NULL, letters[1:2])), matrix(c(3,3,2,5,1,3), 3, dimnames = list(NULL, letters[3:4]))) B <- list(matrix(c(1:5, 20*(1:5), 10+20*(1:5)), 5, dimnames = list(NULL, letters[5:7])), matrix(c(1:5, 10*(1:5), 10+10*(1:5)), 5, dimnames = list(NULL, letters[8:10]))) lapply(1:2, function(i) lapply(1:2, function(j) B[[i]][A[[i]][,j],])) On 10/29/06, Heymans, MW <[EMAIL PROTECTED]> wrote: > Dear list, > > I have this problem, please your advice. > > I have list A that contains two matrix elements: > [[1]] > a b > [1,] 2 1 > [2,] 3 2 > [3,] 3 2 > [[2]] > c d > [1,] 3 5 > [2,] 3 1 > [3,] 2 3 > > and list B, that also contains 2 matrices: > [[1]] > e f g > [1,] 1 20 30 > [2,] 2 40 50 > [3,] 3 60 70 > [4,] 4 80 90 > [5,] 5 100 110 > [[2]] > h i j > [1,] 1 10 20 > [2,] 2 20 30 > [3,] 3 30 40 > [4,] 4 40 50 > [5,] 5 50 60 > > Now I want to match each column of list A with each row of list B in such a > way that element 1 of list A corresponds to element 1 of list B (and element > 2 of A with 2 of B). > So, in total there will be 4 new matrices, 1 for each column of list A. For > example, for column a of list A the new matrix will be: > > 2 40 50 > 3 60 70 > 3 60 70 > > thanks, > Martijn > VUmc > Amsterdam > > >[[alternative HTML version deleted]] > > __ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] match lists
What is it that you don't know how to do? Loop over the matrices from
the 2 lists and merge them two by two, for example
AB <- list() ; id <- 1
for (i in 1:length(A)) for (j in 1:length(B)) {
AB[[id]] <- merge(A[[i]],B[[j]],...)
id <- id + 1
}
To better keep track of who's who, you may want to set up A and B as
named lists, and replace id with
paste(names(A)[i],names(B)[j]).
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Heymans, MW
> Sent: Sunday, October 29, 2006 6:35 PM
> To: r-help@stat.math.ethz.ch
> Subject: [R] match lists
>
> Dear list,
>
> I have this problem, please your advice.
>
> I have list A that contains two matrix elements:
> [[1]]
> a b
> [1,] 2 1
> [2,] 3 2
> [3,] 3 2
> [[2]]
> c d
> [1,] 3 5
> [2,] 3 1
> [3,] 2 3
>
> and list B, that also contains 2 matrices:
> [[1]]
> e f g
> [1,] 1 20 30
> [2,] 2 40 50
> [3,] 3 60 70
> [4,] 4 80 90
> [5,] 5 100 110
> [[2]]
> h i j
> [1,] 1 10 20
> [2,] 2 20 30
> [3,] 3 30 40
> [4,] 4 40 50
> [5,] 5 50 60
>
> Now I want to match each column of list A with each row of
> list B in such a way that element 1 of list A corresponds to
> element 1 of list B (and element 2 of A with 2 of B).
> So, in total there will be 4 new matrices, 1 for each column
> of list A. For example, for column a of list A the new matrix will be:
>
> 2 40 50
> 3 60 70
> 3 60 70
>
> thanks,
> Martijn
> VUmc
> Amsterdam
>
>
> [[alternative HTML version deleted]]
>
> __
> R-help@stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
__
R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
[R] match lists
Dear list, I have this problem, please your advice. I have list A that contains two matrix elements: [[1]] a b [1,] 2 1 [2,] 3 2 [3,] 3 2 [[2]] c d [1,] 3 5 [2,] 3 1 [3,] 2 3 and list B, that also contains 2 matrices: [[1]] e f g [1,] 1 20 30 [2,] 2 40 50 [3,] 3 60 70 [4,] 4 80 90 [5,] 5 100 110 [[2]] h i j [1,] 1 10 20 [2,] 2 20 30 [3,] 3 30 40 [4,] 4 40 50 [5,] 5 50 60 Now I want to match each column of list A with each row of list B in such a way that element 1 of list A corresponds to element 1 of list B (and element 2 of A with 2 of B). So, in total there will be 4 new matrices, 1 for each column of list A. For example, for column a of list A the new matrix will be: 2 40 50 3 60 70 3 60 70 thanks, Martijn VUmc Amsterdam [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
