Re: [R] create one bigger matrix with one smaller matrix

[Giorgio Garziano]

A <- matrix(c(1,2,3,4),2,2)

B <- matrix(A, nrow=14, ncol=14)

> B
  [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12] [,13] [,14]
[1,]131313131 3 1 3 1 3
[2,]242424242 4 2 4 2 4
[3,]313131313 1 3 1 3 1
[4,]424242424 2 4 2 4 2
[5,]131313131 3 1 3 1 3
[6,]242424242 4 2 4 2 4
[7,]313131313 1 3 1 3 1
[8,]424242424 2 4 2 4 2
[9,]131313131 3 1 3 1 3
[10,]242424242 4 2 4 2 4
[11,]313131313 1 3 1 3 1
[12,]424242424 2 4 2 4 2
[13,]131313131 3 1 3 1 3
[14,]242424242 4 2 4 2 4
>


Happy New Year!

--
GG


[[alternative HTML version deleted]]

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Re: [R] create one bigger matrix with one smaller matrix

[David Winsemius]

> On Dec 31, 2015, at 12:28 PM, Kathryn Lord  wrote:
> 
> Dear R users,
> 
> Suppose that I have a matrix A
> 
> A <- matrix(c(1,2,3,4),2,2)
>> A
> [,1] [,2]
> [1,]13
> [2,]24
> 
> With this matrix A, I'd like to create bigger one, for example,
> 
>  [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12] [,13]
> [,14]
> [1,]131313131 3 1 3
> 1 3
> [2,]242424242 4 2 4
> 2 4
> [3,]131313131 3 1 3
> 1 3
> [4,]242424242 4 2 4
> 2 4
> [5,]131313131 3 1 3
> 1 3
> [6,]242424242 4 2 4
> 2 4
> [7,]131313131 3 1 3
> 1 3
> [8,]242424242 4 2 4
> 2 4
> [9,]131313131 3 1 3
> 1 3
> [10,]242424242 4 2 4
> 2 4
> [11,]131313131 3 1 3
> 1 3
> [12,]242424242 4 2 4
> 2 4
> [13,]131313131 3 1 3
> 1 3
> [14,]242424242 4 2 4
> 2 4
> 
> 

str( do.call('rbind', rep(list( do.call('cbind' , rep(list(A), 20) ) ), 20) )  )

#result
 num [1:40, 1:40] 1 2 1 2 1 2 1 2 1 2 ...

The "upper left" corner:

do.call('rbind', rep(list( do.call('cbind' , rep(list(A), 20) ) ), 20) )[1:10, 
1:10]
  [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
 [1,]131313131 3
 [2,]242424242 4
 [3,]131313131 3
 [4,]242424242 4
 [5,]131313131 3
 [6,]242424242 4
 [7,]131313131 3
 [8,]242424242 4
 [9,]131313131 3
[10,]242424242 4
 

> In fact, I want much bigger one. I wonder if there is an elegant way to do
> this?
> 
> Any suggestions? Thank you!
> 
> Best wishes and Happy new year
> 
> Kathie
> 
>   [[alternative HTML version deleted]]

Your use of HTML for email is not appropriate for this list. It messed up your 
example although the intent was not that difficult to discrn.

-- 
David.

> 
> __
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.

David Winsemius
Alameda, CA, USA

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Re: [R] create one bigger matrix with one smaller matrix

[Bert Gunter]

Well, all of the solutions proposed are a bit tricky in that the
matrix must be "constructed" by hand. They are also reinventing
wheels. What I think you really want is the kronecker product, which
is the matrix operation that does exactly what you want. e.g.

A <- matrix(1:4, nr=2)

to create a new matrix with e.g. 2 x 6 "positions" in each of which is
A, simply do

kronecker (matrix(1, nr = 2, nc=6), A)

or if you want to use the operator form:

matrix(1,nr=2, nc=6) %x% A

See ?kronecker
Bert Gunter

"The trouble with having an open mind is that people keep coming along
and sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )


On Thu, Dec 31, 2015 at 12:28 PM, Kathryn Lord
 wrote:
> Dear R users,
>
> Suppose that I have a matrix A
>
> A <- matrix(c(1,2,3,4),2,2)
>> A
>  [,1] [,2]
> [1,]13
> [2,]24
>
> With this matrix A, I'd like to create bigger one, for example,
>
>   [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12] [,13]
> [,14]
>  [1,]131313131 3 1 3
> 1 3
>  [2,]242424242 4 2 4
> 2 4
>  [3,]131313131 3 1 3
> 1 3
>  [4,]242424242 4 2 4
> 2 4
>  [5,]131313131 3 1 3
> 1 3
>  [6,]242424242 4 2 4
> 2 4
>  [7,]131313131 3 1 3
> 1 3
>  [8,]242424242 4 2 4
> 2 4
>  [9,]131313131 3 1 3
> 1 3
> [10,]242424242 4 2 4
> 2 4
> [11,]131313131 3 1 3
> 1 3
> [12,]242424242 4 2 4
> 2 4
> [13,]131313131 3 1 3
> 1 3
> [14,]242424242 4 2 4
> 2 4
>
>
> In fact, I want much bigger one. I wonder if there is an elegant way to do
> this?
>
> Any suggestions? Thank you!
>
> Best wishes and Happy new year
>
> Kathie
>
> [[alternative HTML version deleted]]
>
> __
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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[R] create one bigger matrix with one smaller matrix

[Kathryn Lord]

Dear R users,

Suppose that I have a matrix A

A <- matrix(c(1,2,3,4),2,2)
> A
 [,1] [,2]
[1,]13
[2,]24

With this matrix A, I'd like to create bigger one, for example,

  [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12] [,13]
[,14]
 [1,]131313131 3 1 3
1 3
 [2,]242424242 4 2 4
2 4
 [3,]131313131 3 1 3
1 3
 [4,]242424242 4 2 4
2 4
 [5,]131313131 3 1 3
1 3
 [6,]242424242 4 2 4
2 4
 [7,]131313131 3 1 3
1 3
 [8,]242424242 4 2 4
2 4
 [9,]131313131 3 1 3
1 3
[10,]242424242 4 2 4
2 4
[11,]131313131 3 1 3
1 3
[12,]242424242 4 2 4
2 4
[13,]131313131 3 1 3
1 3
[14,]242424242 4 2 4
2 4


In fact, I want much bigger one. I wonder if there is an elegant way to do
this?

Any suggestions? Thank you!

Best wishes and Happy new year

Kathie

[[alternative HTML version deleted]]

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and provide commented, minimal, self-contained, reproducible code.

Re: [R] create one bigger matrix with one smaller matrix

[Michael Hannon]

Something like:

A <- matrix(c(1,2,3,4),2,2)
A

B <- matrix(rep(A, 4), nrow=2)
B

C <- do.call(rbind, lapply(1:8, function(x) B))
C


On Thu, Dec 31, 2015 at 12:28 PM, Kathryn Lord
 wrote:
> Dear R users,
>
> Suppose that I have a matrix A
>
> A <- matrix(c(1,2,3,4),2,2)
>> A
>  [,1] [,2]
> [1,]13
> [2,]24
>
> With this matrix A, I'd like to create bigger one, for example,
>
>   [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12] [,13]
> [,14]
>  [1,]131313131 3 1 3
> 1 3
>  [2,]242424242 4 2 4
> 2 4
>  [3,]131313131 3 1 3
> 1 3
>  [4,]242424242 4 2 4
> 2 4
>  [5,]131313131 3 1 3
> 1 3
>  [6,]242424242 4 2 4
> 2 4
>  [7,]131313131 3 1 3
> 1 3
>  [8,]242424242 4 2 4
> 2 4
>  [9,]131313131 3 1 3
> 1 3
> [10,]242424242 4 2 4
> 2 4
> [11,]131313131 3 1 3
> 1 3
> [12,]242424242 4 2 4
> 2 4
> [13,]131313131 3 1 3
> 1 3
> [14,]242424242 4 2 4
> 2 4
>
>
> In fact, I want much bigger one. I wonder if there is an elegant way to do
> this?
>
> Any suggestions? Thank you!
>
> Best wishes and Happy new year
>
> Kathie
>
> [[alternative HTML version deleted]]
>
> __
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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.