[R] incorrect number of subscripts on matrix

[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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