Re: [R] matrix loop

2008-02-09 Thread David Winsemius 
John Kane [EMAIL PROTECTED] wrote in
news:[EMAIL PROTECTED]: 

 You are trying to create a matrix in the loop 
 
 Try creating the matrix before the loop
  m - 1:5
  n-1:10
  y - matrix(rep(NA, 50), nrow=m)

# I think that this might actually work:

y - matrix(rep(NA, 50), nrow=max(m))

  for(i in 1:length(m))
  { for(j in 1:length(n))
   {
   y[i,j]=sum(i,j)
   }
   }

#produced:
Error in y[i, j] = sum(i, j) : subscript out of bounds

-- 
David Winsemius

 
 However as Jim Holtman points out you can do this
 particular matrix by
 
   outer(1:5, 1:10, +)
 
 
 --- mohamed nur anisah [EMAIL PROTECTED]
 wrote:
 
 Dear list,

   I'm trying to make a loop of a (5x10) matrix and
 below are my codes. Could anybody help me figure out
 why my loop is not working. Thanks in advance!!


   m-1:5
 n-1:10
 for(i in 1:length(m))
 { for(j in 1:length(n))
  { 
   y[i,j]=sum(i,j)
   y-as.matrix(y[i,j]) 
  }
   }
   cheers,

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Re: [R] matrix loop

2008-02-08 Thread John Kane 
You are trying to create a matrix in the loop 

Try creating the matrix before the loop
 m - 1:5
 n-1:10
 y - matrix(rep(NA, 50), nrow=m)
 for(i in 1:length(m))
 { for(j in 1:length(n))
  {
  y[i,j]=sum(i,j)
  }
  }

However as Jim Holtman points out you can do this
particular matrix by

  outer(1:5, 1:10, +)


--- mohamed nur anisah [EMAIL PROTECTED]
wrote:

 Dear list,

   I'm trying to make a loop of a (5x10) matrix and
 below are my codes. Could anybody help me figure out
 why my loop is not working. Thanks in advance!!


   m-1:5
 n-1:10
 for(i in 1:length(m))
 { for(j in 1:length(n))
  { 
   y[i,j]=sum(i,j)
   y-as.matrix(y[i,j]) 
  }
   }
   cheers,
   Anisah
 

 -
 
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 __
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 http://www.R-project.org/posting-guide.html
 and provide commented, minimal, self-contained,
 reproducible code.


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Re: [R] matrix loop

2008-02-06 Thread jim holtman 
What exactly are you intending the loop to do?  Why do you have the
'as.matrix' in the middle of the loop?  Where was 'y' defined?   Does
this do what you want?

 outer(1:5, 1:10, +)
 [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
[1,]23456789   1011
[2,]3456789   10   1112
[3,]456789   10   11   1213
[4,]56789   10   11   12   1314
[5,]6789   10   11   12   13   1415



On Feb 6, 2008 7:52 PM, mohamed nur anisah [EMAIL PROTECTED] wrote:
 Dear list,

  I'm trying to make a loop of a (5x10) matrix and below are my codes. Could 
 anybody help me figure out why my loop is not working. Thanks in advance!!


  m-1:5
 n-1:10
 for(i in 1:length(m))
 { for(j in 1:length(n))
  {
  y[i,j]=sum(i,j)
  y-as.matrix(y[i,j])
  }
  }
  cheers,
  Anisah


 -

[[alternative HTML version deleted]]

 __
 R-help@r-project.org mailing list
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 PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
 and provide commented, minimal, self-contained, reproducible code.




-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?

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