[R] tseries object

[ozric@web.de]

Hello,
what's the problem with the dimnames - i get no solution ? 
thanks for advance, regards
christian

> file <- read.table("c:/rw1040/data/timeSeries.txt",header=T)
> file
     DATE   AQ  EUMS
1   Jan92  7.6  98.4
2   Feb92  7.5  98.5
3   Mrz92  7.5  97.0
....................
117 Sep01  9.4 105.3
118 Okt01  9.5 102.6

> file.ts <- ts(file,start=c(1992,1),end=c(2001,10),frequency=12)
Error in "dimnames<-.data.frame"(*tmp*, value = list(NULL, names)) : 
        invalid dimnames given for data frame
> file.ts <- ts(file,start=c(1992,1),frequency=12)
Error in "dimnames<-.data.frame"(*tmp*, value = list(NULL, names)) : 
        invalid dimnames given for data frame







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