[R] getting the output after bootstraping

2010-09-30 Thread Michael Larkin
Thanks to the help of people from this forum I was able to bootstrap my data and then apply a model to it. Thanks for all your help. Everything worked out well, but I am having a difficult time getting the new parameter values. I bootstrapped the data 300 times and I want to get the 300 set

[R] fitting model to resampled data

2010-09-29 Thread Michael Larkin
I apologize if this comes across as confusing. I will try to explain my situation as best I can. I have R bootstrapping my growth data for fish. It's resampling my database of age and length data and then produces several new datasets for me. In this case, it's resampling my data to create

[R] resampling issue

2010-09-29 Thread Michael Larkin
I am trying to get R to resample my dataset of two columns of age and length data for fish. I got it to work, but it is not resampling every replicate. Instead, it resamples my data once and then repeated it 5 times. Here is my dataset of 9 fish samples with an age and length for each one: A

[R] repeat a function

2010-09-28 Thread Michael Larkin
I have R randomly sampling my array made up of 2 columns of data. Here is my code randomly sampling 5 different rows from my dataset to create a new dataset of 8 rows of data: testdat<-growth[sample(5,8,replace=T),] Now I want to tell R to repeat this function 50 times and give me the

[R] ramdom sampling from a dataset

2010-09-28 Thread Michael Larkin
I am trying to get R to pick random integers from my dataset (i.e. bootstrapping) with replacement. However, my attempts at this have been unsuccessful. Here is a basic example of what I am doing: I have a data vector of 8 integers (data= 2,5,9,4,5,6,7,8). I used the sample function and it wo

[R] next step in randomly sampling

2010-09-28 Thread Michael Larkin
Thanks to the people on this list I was able to fix my code for randomly sampling. Thanks. Now, I am moving on to the next step and I ran into another snag. I have a large dataset but I am starting with a small made-up dataset until I figure it out. I have two columns of data (age and leng

Re: [R] need help with ramdomly sampling some data

2010-09-28 Thread Michael Larkin
I got it to work. I didn't have the data listed as a vector (c in front of the data). I copied Peter's code and it worked perfectly. Thanks! Mike From: Jonathan Christensen [mailto:dzhona...@gmail.com] Sent: Tuesday, September 28, 2010 9:31 PM To: Michael Larkin Cc

[R] need help with ramdomly sampling some data

2010-09-28 Thread Michael Larkin
I am trying to get R to randomly select values from my dataset (i.e. bootstrapping) with replacement. However, my attempts at this have been unsuccessful. Here is a basic example of what I am doing: I have a data vector of 8 values (i.e. data= 2,5,9,4,5,6,7,8). I used the sample function and