[R] resampling problem counting number of means above a specific value

[Dimitris Rizopoulos]

try the following:

LL <- c(12.5,17,12,11.5,9.5,15.5,16,14)
n <- length(LL)
N <- 1000
threshold <- 10

smpls <- sample(LL, N*n, replace = TRUE)
dim(smpls) <- c(n, N)
cnt <- sum(colMeans(smpls) > threshold)
cnt


I hope it helps.

Best,
Dimitris


Graham Smith wrote:
> I am trying to modify some code from Good 2005.
> 
> I am trying  to resample the mean of 8 values and then count how many
> times the resampled mean is greater than 10. But my count of means
> above 10 is coming out as zero, which I know isn't correct.
> 
> I would appreciate it if someone could look at the code below and tell
> me what I am doing wrong.
> 
> Many thanks,
> 
> Graham
> 
>> LL<- c(12.5,17,12,11.5,9.5,15.5,16,14)
>> N<-1000
>> n<-length(LL)
>> threshold<-10
>> cnt<-0
>> for(i in 1:N){
> + LLb <- sample (LL, n, replace=TRUE)
> + if (mean(LLb)<=threshold) cnt<-cnt+1
> + }
>> cnt
> [1] 0
> 
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-- 
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus University Medical Center

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