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variable object naming

4 messages · Benjamin M. Osborne, Gabor Grothendieck, Thomas Lumley +1 more

Original
Benjamin M. Osborne
# 
Is it possible to give a temporary object a name that varies with each run of a
foreloop?  For example, I want to fill a matrix every time I run a loop, and I
want a new matrix with each run, with an appropriate new name.
i.e.:
for(i in 1:5){...  matrix.i<-some values ...}

so that in the end I would have:
matrix.1
matrix.2
matrix.3
matrix.4
matrix.5

Thanks,
Ben Osborne

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University of Vermont
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Gabor Grothendieck
# 
Benjamin M. Osborne <Benjamin.Osborne <at> uvm.edu> writes:

: 
: Is it possible to give a temporary object a name that varies with each run 
of a
: foreloop?  For example, I want to fill a matrix every time I run a loop, and 
I
: want a new matrix with each run, with an appropriate new name.
: i.e.:
: for(i in 1:5){...  matrix.i<-some values ...}
: 
: so that in the end I would have:
: matrix.1
: matrix.2
: matrix.3
: matrix.4
: matrix.5


See 7.1 of the FAQ.
Thomas Lumley
#
On Mon, 22 Nov 2004, Gabor Grothendieck wrote:

            

      
      
      
    

        
Especially the part that says this probably isn't what you want to do. You 
would likely be better off with a list, and doing
     matrixlist[[i]]<-some_values


 	-thomas

  
  


  


      

    

    

      
      

        


  

        

      Michael Grant
    

    

      
      #
    

  


  

      
Is this, i.e., using 'assign', the direction you want
to go? If so, pay attention to the 'envir' parameter.

BEGIN FROM Stat-R-US:
http://www.ku.edu/~pauljohn/R/Rtips.html#2.2
...
2.2 Create variable names "on the fly"   (10/04/2001
Paul Johnson <pauljohn at ukans.edu>) 

Paste together a variable name, set it to a value. Use
assign. As in

            

      
      
      
    

        
[1] "file1max"

(Brian Ripley, June 18, 2001)
...

END FROM STAT-R-US

Regards,
Michael Grant

--- "Benjamin M. Osborne" <Benjamin.Osborne at uvm.edu>
wrote: