[R] incorrect number of subscripts on matrix

[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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