R help - May 2012 - auto.arima problem

Dear all,


     I would like to ask how my data set contains problems.
     Here is what I have done.

SandP =  read.csv("Price.csv")
library("forecast")
auto.arima(SandP)

and

R shewed this to me

Error in model.frame.default(formula = x ~ 1, drop.unused.levels = TRUE) : 
  invalid type (list) for variable 'x'


In my data set SandP
it contains 1 column of the daily index of S&P500, which is a US stock
index.


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On 29/05/2012 09:44, Actuarial_Labor wrote:
> Dear all,
>
>
>       I would like to ask how my data set contains problems.
>       Here is what I have done.
>
> SandP =  read.csv("Price.csv")
> library("forecast")
> auto.arima(SandP)
That's a data frame, not (from the help):

        x: a univariate time series
> and
>
> R shewed this to me
>
> Error in model.frame.default(formula = x ~ 1, drop.unused.levels = TRUE) :
>    invalid type (list) for variable 'x'
>
>
> In my data set SandP
> it contains 1 column of the daily index of S&P500, which is a US stock
> index.
>
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-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
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