Re: [R] predicting without a model

2010-05-11 Thread Felipe Carrillo
Subject: Re: [R] predicting without a model > > Felipe Carrillo > href="http://yahoo.com";>yahoo.com> > writes: ## snip   > In the absence of any other information, I would say your best bet would just > be to take the weekly average across the previous ye

Re: [R] predicting without a model

2010-05-11 Thread Rob Forler
I forgot to reply to all: This is what I sent earlier to him: """ I would look at the data. You don't really have any information other than what appears to be the weekly passage. I would look to see if there is any relationship between the current value of passage and previous values of passage.

Re: [R] predicting without a model

2010-05-11 Thread Ben Bolker
Felipe Carrillo yahoo.com> writes: ## snip In the absence of any other information, I would say your best bet would just be to take the weekly average across the previous years. There are lots of ways to do this (tapply, aggregate, etc.), but cast() works: fallavg <- cast(fallmelt,value="val

[R] predicting without a model

2010-05-11 Thread Felipe Carrillo
Hello: I have 5 years of weekly passage data and want to predict fish passage for the following year. I don't have a model to use to predict data for the sixth year. Can I somehow still predict based on these five years? I just want to see on the graph what the predicted year would look like and ho