R help - May 2005 - acf problem ?

Hi

I'm getting the following error that do not make sense to me, what am 
Idoing wrong ?

 > acf(Recsim[1,], lag.max=1)
Error in acf(Recsim[1, ], lag.max = 1) : 'lag.max' must be at least 1

Regards

EJ

On Thu, 12 May 2005, Ernesto Jardim wrote:
> I'm getting the following error that do not make sense to me, what am
Idoing
> wrong ?
>
>> acf(Recsim[1,], lag.max=1)
> Error in acf(Recsim[1, ], lag.max = 1) : 'lag.max' must be at least
1
Inside the code

     lag.max <- min(lag.max, sampleT - 1)
     if (lag.max < 1)
         stop("'lag.max' must be at least 1")

so you have only one point in your `time series', I think.

-- 
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)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

Ernesto Jardim wrote:
> Hi
>
> I'm getting the following error that do not make sense to me, what am 
> Idoing wrong ?
>
> > acf(Recsim[1,], lag.max=1)
> Error in acf(Recsim[1, ], lag.max = 1) : 'lag.max' must be at least
1
>
> Regards
>
> EJ
>
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Hi

The problem was that Recsim[1,] was not numeric.

EJ

Ernesto Jardim wrote on 5/12/2005 11:01 AM:
> Hi
> 
> I'm getting the following error that do not make sense to me, what am 
> Idoing wrong ?
> 
>  > acf(Recsim[1,], lag.max=1)
> Error in acf(Recsim[1, ], lag.max = 1) : 'lag.max' must be at least
1
> 
> Regards
> 
> EJ
> 
Hi, Ernesto,

What is Recsim[1,]? I can reproduce this error using:

 > acf(c(lh), 1)
 > acf(matrix(lh,ncol=1), 1)
 > acf(matrix(lh,nrow=1), 1)
Error in acf(matrix(lh, nrow = 1), 1) : 'lag.max' must be at least 1

So, maybe try

acf(c(Recsim[1,]), lag.max=1)

HTH,

--sundar