[R] dynamic object names?

2005-09-19 Thread samir 

I am trying to extract data from a matrix. Let's say that i am interested in
extracting 
rows from a 4x4 matrix. Instead of giving a fix name to these 4 rows I would
like to add a number to prefix. As result I should get 4 objects named: 

prefix_1 
prefix_2 
prefix_3
prefix_4

I attepted to solve the problem with a loop, but without success. Any hints??

 matrix(LETTERS[1:16], ncol=4) - MM
 MM
 [,1] [,2] [,3] [,4]
[1,] A  E  I  M 
[2,] B  F  J  N 
[3,] C  G  K  O 
[4,] D  H  L  P 


for (xxx in 1:4) {
MM[xxx,] - prefix_xxx;
}


Thanks

samir

__
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

Re: [R] dynamic object names?

2005-09-19 Thread Uwe Ligges 
[EMAIL PROTECTED] wrote:

 I am trying to extract data from a matrix. Let's say that i am interested in
 extracting 
 rows from a 4x4 matrix. Instead of giving a fix name to these 4 rows I would
 like to add a number to prefix. As result I should get 4 objects named: 
 
 prefix_1 
 prefix_2 
 prefix_3
 prefix_4
 
 I attepted to solve the problem with a loop, but without success. Any hints??


1. In fact, you do not really want it.
2. You want to use - rather than - for assigments. Reading your 
code is really hard when you are using this non-conventional way.
3. In order to answer your question: This is the FAQ How can I turn a 
string into a variable?. The posting guide asks you to read these FAQs 
before sending questions to R-help. Please do so.

Uwe Ligges




 
matrix(LETTERS[1:16], ncol=4) - MM
MM
 
  [,1] [,2] [,3] [,4]
 [1,] A  E  I  M 
 [2,] B  F  J  N 
 [3,] C  G  K  O 
 [4,] D  H  L  P 
 
 
 for (xxx in 1:4) {
 MM[xxx,] - prefix_xxx;
 }
 
 
 Thanks
 
 samir
 
 __
 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

__
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

Re: [R] dynamic object names?

2005-09-19 Thread John Charles Considine 
On Mon, 2005-09-19 at 11:38 +0200, Uwe Ligges wrote:
 [EMAIL PROTECTED] wrote:
 
  I am trying to extract data from a matrix. Let's say that i am interested in
  extracting 
  rows from a 4x4 matrix. Instead of giving a fix name to these 4 rows I would
  like to add a number to prefix. As result I should get 4 objects named: 
  
  prefix_1 
  prefix_2 
  prefix_3
  prefix_4
Samir,
In addition to the other comments, part of the problem may be that you
can't assign the character '_' to standard objects.  Could you use '.'
instead?

JC 

  
  I attepted to solve the problem with a loop, but without success. Any 
  hints??
 
 
 1. In fact, you do not really want it.
 2. You want to use - rather than - for assigments. Reading your 
 code is really hard when you are using this non-conventional way.
 3. In order to answer your question: This is the FAQ How can I turn a 
 string into a variable?. The posting guide asks you to read these FAQs 
 before sending questions to R-help. Please do so.
 
 Uwe Ligges
 
 
 
 
  
 matrix(LETTERS[1:16], ncol=4) - MM
 MM
  
   [,1] [,2] [,3] [,4]
  [1,] A  E  I  M 
  [2,] B  F  J  N 
  [3,] C  G  K  O 
  [4,] D  H  L  P 
  
  
  for (xxx in 1:4) {
  MM[xxx,] - prefix_xxx;
  }
  
  
  Thanks
  
  samir
  
  __
  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
 
 __
 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

__
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

Re: [R] dynamic object names?

2005-09-19 Thread vincent 
see
?paste
hih

__
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

Re: [R] dynamic object names?

2005-09-19 Thread Uwe Ligges 
John Charles Considine wrote:

 On Mon, 2005-09-19 at 11:38 +0200, Uwe Ligges wrote:
 
[EMAIL PROTECTED] wrote:


I am trying to extract data from a matrix. Let's say that i am interested in
extracting 
rows from a 4x4 matrix. Instead of giving a fix name to these 4 rows I would
like to add a number to prefix. As result I should get 4 objects named: 

prefix_1 
prefix_2 
prefix_3
prefix_4
 
 Samir,
 In addition to the other comments, part of the problem may be that you
 can't assign the character '_' to standard objects.


Why not???
R can handle standard names with _ in it for ages now.

Uwe Ligges



  Could you use '.' instead?
 JC 
 
 
I attepted to solve the problem with a loop, but without success. Any hints??


1. In fact, you do not really want it.
2. You want to use - rather than - for assigments. Reading your 
code is really hard when you are using this non-conventional way.
3. In order to answer your question: This is the FAQ How can I turn a 
string into a variable?. The posting guide asks you to read these FAQs 
before sending questions to R-help. Please do so.

Uwe Ligges





matrix(LETTERS[1:16], ncol=4) - MM
MM

 [,1] [,2] [,3] [,4]
[1,] A  E  I  M 
[2,] B  F  J  N 
[3,] C  G  K  O 
[4,] D  H  L  P 


for (xxx in 1:4) {
MM[xxx,] - prefix_xxx;
}


Thanks

samir

__
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

__
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
 
 
 __
 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

__
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