[R] Skipping lines and incomplete rows

[Rui Barradas]

Hello,

That seems easy.

dat$variable1 <- with(dat, paste(variable1, variable2))
dat$variable2 <- dat$variable3
dat$variable3 <- ""

Then convert variable1 to date/time using as.POSIXct or strptime

See ?strptime.

Hope this helps,

Rui Barradas

Em 11-07-2012 13:30, vioravis escreveu:
> Thanks a lot for the guidance. I have another text file with a time stamp and
> an empty column as given below:
>
> ********************************************************************************************
> First line: Skip this line
> Second line: skip this line
> Third line: skip this line
> variable1 Variable2 Variable3 Variable4
>                  Unit1     Unit2     Unit3
> 11/1/2004 0:00  0.1                 0.001
> 11/1/2004 0:10  0.2                 0.002
> 11/1/2004 0:20  0.3                 0.003
> 11/1/2004 0:30  0.4                 0.004
> ********************************************************************************************
>
> This is space separated text file. When I use the following code:
>
> head <- readLines("testInput.txt", n=4)[4]
> dat <- read.table("testInput.txt", skip=5, sep="",fill = TRUE,
> stringsAsFactors=FALSE)
> names(dat) <- unlist(strsplit(head, " "))
>
> I get the following output:
>
>> str(dat)
> 'data.frame':   4 obs. of  4 variables:
>   $ variable1: chr  "11/1/2004" "11/1/2004" "11/1/2004" "11/1/2004"
>   $ Variable2: chr  "0:00" "0:10" "0:20" "0:30"
>   $ Variable3: num  0.1 0.2 0.3 0.4
>   $ Variable4: num  0.001 0.002 0.003 0.004
>
> Variable1's date and time gets split as Variable1 and Variable2 whereas they
> should both be part of Variable1.
>
> Also, the empty column is missing from the data frame.
>
> Is there a way to handle these two cases?
>
> Thank you.
>
> Ravi
>
>
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