Re: [R] bootstrapping for maxium data

2014-05-21 Thread Angelo Canty
Yichun, 1. You are doing this wrong! 2. It is the wrong thing to do! In more detail: 1. To use boot, it helps to read the help file which clearly says the statistic must be a function of two arguments, the original dataset and the indices saying which of the original datapoints are in the boot

Re: [R] bootstrapping for maxium data

2014-05-21 Thread Bert Gunter
Perhaps it should be mentioned that resampling does not produce a correct CI for extreme quantiles, so the whole exercise may be pointless. Cheers, Bert Bert Gunter Genentech Nonclinical Biostatistics (650) 467-7374 "Data is not information. Information is not knowledge. And knowledge is certain

Re: [R] bootstrapping for maxium data

2014-05-21 Thread David Winsemius
Run the examples in the ?boot help page. Notice that boot needs a function that accepts a dataframe and an index vector. Sent from my iPhone > On May 21, 2014, at 1:49 AM, 张以春 wrote: > > Dear friends, > > > I have a numeric vector composed of 320 numbers. > > > Now, I want to do resample

[R] bootstrapping for maxium data

2014-05-20 Thread 张以春
Dear friends, I have a numeric vector composed of 320 numbers. Now, I want to do resample for 1 times. I want to get maxium number for every trial and get a 1 maxium numbers. I have tried to use "boot" package such as follows. results<-boot(data=nearshore1,statistic=max,R=1,st