] On Behalf Of nabble.30.miller_2...@spamgourmet.com
> Sent: Wednesday, November 25, 2009 2:40 PM
> To: r-help@r-project.org
> Cc: r-help
> Subject: Re: [R] Feature request for as.Date() function 20)
>
> On Wed, Nov 25, 2009 at 2:56 PM, jim holtman - jholt...@gmail.com
> <+
The situation he is referring to seems to be this:
> L <- "date,value\n'2009-01-01',10\n'2009-02-01',1\n'NA', 3"
> read.csv(textConnection(L), colClasses = c("Date", "numeric"))
Error in charToDate(x) :
character string is not in a standard unambiguous format
where all the fields in the date c
On Thu, Nov 26, 2009 at 12:08 AM, jim holtman - jholt...@gmail.com
<+nabble+miller_2555+9dc9649aca.jholtman#gmail@spamgourmet.com>
wrote:
> An easy way is just to write your own function that will accept "NA",
> convert it to NA and then call as.Date.
>
I have written such a function, which ha
An easy way is just to write your own function that will accept "NA",
convert it to NA and then call as.Date.
R is a functional language, so write some functions. Don't try to
overload existing functions with new options that may break a lot of
existing code. If you have special requirements, th
On Wed, Nov 25, 2009 at 2:56 PM, jim holtman - jholt...@gmail.com
<+nabble+miller_2555+9dc9649aca.jholtman#gmail@spamgourmet.com>
wrote:
> Seems to work fine in my testing:
>
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-co
hi,
it fails, when the NA is surrounded by double quotes, which is the
default way of quoting of the write.table command.
x <- read.csv(textConnection('date,value
+ + 2009-01-01,10
+ + 2009-02-01,1
+ + "NA", 3'), colClasses=c("Date", 'integer'))
Fehler in fromchar(x) :
character string is not in
Seems to work fine in my testing:
> x <- read.csv(textConnection("date,value
+ 2009-01-01,10
+ 2009-02-01,1
+ 'NA', 3"), colClasses=c("Date", 'integer'))
>
> str(x)
'data.frame': 3 obs. of 2 variables:
$ date :Class 'Date' num [1:3] 14245 14276 NA
$ value: int 10 1 3
> x <- read.csv(textCon
Hello -
I have a csv file with a few date columns. Some of the records have an
"NA" character string instead of the date. When I attempt to use
read.csv() and typecast the columns using colClasses, I receive the
following error:
Error in charToDate(x) :
character string is not in a stand
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