Message-ID: <549102.89631.qm@web56605.mail.re3.yahoo.com>
Date: 2009-04-05T06:13:27Z
From: Felipe Carrillo
Subject: predicting values into the future
Hi:
I have usually used the GROWTH() excel function to do this but now want to see if I can do this with R.
I want to predict values into the future, possibly with the predict.arima Function.
I have the following weekly fish weight averages:
weight <- c("2.1","2.4","2.8","3.6","4.1","5.2","6.3")
week <- c("1","2","3","4","5","6","7")
I would like to predict what the weight will be by week 10 based on my weight values and make a line plot of all the weights(including the predicted values). I have two questions:
1- Should the predicted values be linear or exponential?
2- Is the predict.arima function appropriate to do this?
Thanks in advance.
Felipe D. Carrillo
Supervisory Fishery Biologist
Department of the Interior
US Fish & Wildlife Service
California, USA