
Hello,
i would like to import this txt file:

Giorno;PM10
2006-01-01 10:10;10.3
2006-02-02 20:22;50.3
2006-03-03 23:33;20.1
.........


As it's an irregular time series i use zoo as follow:

require(zoo)
z <- read.table("c:\\1.csv", sep=";", na.strings="-999", header=TRUE)
q <- zoo(z$PM10, strptime(as.character(z$Giorno),"%Y-%m-%d %H:%M"))

At this point this error message appears:

Errore in order(x, ..., na.last = na.last, decreasing = decreasing) : 
        tipo 'list' non implementato in 'orderVector1'


I can't understand how can I import such a file. Is there anybody who can help me?

Thanks

Domenico


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