Re: [R] incorrect number of subscripts on matrix

2012-06-30 Thread Patrick Burns 

Andre,

1) The matrix you created was called 'x.3', not 'x'.
I guess this could be an item in 'The R Inferno',
perhaps it falls into Circle 8.3.32.

2) You don't need a loop at all:

x.3 - matrix(rexp(3000, rate=2/3), nrow=1000)

This is Circle 3.

http://www.burns-stat.com/pages/Tutor/R_inferno.pdf

Pat

On 30/06/2012 05:09, andre bedon wrote:


Hi,
Wondering if anyone could help me out with this error.Im trying to fill a 
matrix with random numbers taken from an exponential distribution using a loop:
x.3-matrix(rep(0,3000),nrow=1000,byrow=T)for(i in 
1:1000){x[i,]-rexp(3,rate=2/3)}
I get the error message:
Error in x[i, ] - rexp(3, rate = 2/3) :   incorrect number of subscripts on 
matrix
Any ideas??? Appreciate any thoughts.   
[[alternative HTML version deleted]]

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Patrick Burns
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Re: [R] incorrect number of subscripts on matrix

2012-06-30 Thread Berend Hasselman 

andre bedon wrote
 
 Hi,
 Wondering if anyone could help me out with this error.Im trying to fill a
 matrix with random numbers taken from an exponential distribution using a
 loop:
 x.3-matrix(rep(0,3000),nrow=1000,byrow=T)for(i in
 1:1000){x[i,]-rexp(3,rate=2/3)}
 I get the error message:
 Error in x[i, ] - rexp(3, rate = 2/3) :   incorrect number of subscripts
 on matrix
 Any ideas??? Appreciate any thoughts. 
   
 

If I run your example as given I get a different error message:

Error: unexpected 'for' in x.3-matrix(rep(0,3000),nrow=1000,byrow=T)for

How about doing

x-matrix(rep(0,3000),nrow=1000,byrow=T);for(i in
1:1000){x[i,]-rexp(3,rate=2/3)}

so that x is a matrix.

Berend


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[R] incorrect number of subscripts on matrix

2012-06-29 Thread andre bedon 

Hi,
Wondering if anyone could help me out with this error.Im trying to fill a 
matrix with random numbers taken from an exponential distribution using a loop:
x.3-matrix(rep(0,3000),nrow=1000,byrow=T)for(i in 
1:1000){x[i,]-rexp(3,rate=2/3)}
I get the error message:
Error in x[i, ] - rexp(3, rate = 2/3) :   incorrect number of subscripts on 
matrix
Any ideas??? Appreciate any thoughts. 
[[alternative HTML version deleted]]

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R-help@r-project.org 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.