[R] Error: cannot take a sample larger than the population

[Chuck Cleland]

Aldi Kraja wrote:
> Hi,
> In Splus7 this statement
> xlrmN1 <- sample(c(0,1,2),400 ,prob=c(0.02 ,0.93 ,0.05 ))
> worked fine, but in R the interpreter reports that the length of the 
> vector to chose c(0,1,2) is shorter than the size of many times I want 
> to be selected from the vector c(0,1,2).
> Any good reason?
> See below the error.
> 
>  > xlrmN1 <- sample(c(0,1,2),400 ,prob=c(0.02 ,0.93 ,0.05 ))
> Error in sample(length(x), size, replace, prob) :
>         cannot take a sample larger than the population
>  when 'replace = FALSE'
> Execution halted

  So why not use replace = TRUE ?

xlrmN1 <- sample(c(0,1,2),400 ,prob=c(0.02 ,0.93 ,0.05 ), replace=TRUE)

table(xlrmN1)
xlrmN1
  0   1   2
  5 373  22

prop.table(table(xlrmN1))
xlrmN1
     0      1      2
0.0125 0.9325 0.0550

> TIA,
> 
> Aldi
> 
> --
> 
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Chuck Cleland, Ph.D.
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