Why couldn't R find the auto.arima function?

Question

I am new to R. I encountered an error when I wanted to use the auto.arima function. The message was:

could not find function "auto.arima"

I've installed the forecast package. I'm using R2.14.1 version and forecast 3.16 in windows 7 operating system. What can I do?

If I could use the auto.arima function in R and get the best result model, I want to call the auto.arima method in my Java project. How would I use the R library in java project?

Answer 1

As the others pointed out: You have downloaded the package with install.packages() or from the menu but you did not load the package. This is done by library(forecast) or require(forecast) . You can obtain single functions as well with the command: package::function() just like: forecast::auto.arima() . So much for a little clarification. If you need a graphical user interface (it makes life easier) check out Rstudio Rstudio or R commander install.packages(Rcmdr) or rJava proposed by Zach.

Answer 2

1. As @Jeromy Anglim says: library(forecast)
2. http://www.rforge.net/rJava/

Answer 3

安装时，请确保标记“安装依赖项”选项。

Answer 4

To use the auto.arima package, you need to install the package "quadprog". Install that package first and put forecast into library and you should be ok

Answer 5

You need to do the following steps

install.packages("xts")
install.packages("forecast", dependencies = TRUE)
library(forecast)

This worked for me.