iugno 2021 15.46
A: r-help@r-project.org; Stefano Sofia; r-help mailing list
Oggetto: Re: [R] empty data frame and POSIXct data types
1) It _is_ a vector. Why do you think it is not a vector?
2) Your data frame has one row, with an NA in the date_POSIX column. You cannot
fit a vector of length 2 a
w...@dcn.davis.ca.us]
Inviato: giovedì 24 giugno 2021 15.46
A: r-help@r-project.org; Stefano Sofia; r-help mailing list
Oggetto: Re: [R] empty data frame and POSIXct data types
1) It _is_ a vector. Why do you think it is not a vector?
2) Your data frame has one row, with an NA in the date_POSI
Hi Stefano,
my guess is that you're expecting data recycling to apply but your
data frame is only one row long... therefore you can't insert a 2-row
vector into a 1-row vector. Recycling won't help.
You should specify the number of rows that will be required in your
data frame using (e.g) rep().
1) It _is_ a vector. Why do you think it is not a vector?
2) Your data frame has one row, with an NA in the date_POSIX column. You cannot
fit a vector of length 2 as a column into a data frame with only 1 row.
What are you trying to do? Do you really want to end up with a 2-row data frame
or a
On Wed, Apr 27, 2011 at 4:58 AM, Dennis Murphy wrote:
> Hi:
>
> You could try something like
>
> df <- data.frame( expand.grid( Week = 1:52, Year = 2002:2011 ))
expand.grid already returns a data frame... You might want
KEEP.OUT.ATTRS = F though. Even it feels like you are yelling at R.
Hadley
Hi:
You could try something like
df <- data.frame( expand.grid( Week = 1:52, Year = 2002:2011 ))
dim(df)
head(df)
The first variable changes faster than the second.
HTH,
Dennis
On Wed, Apr 27, 2011 at 1:03 AM, Santosh Srinivas
wrote:
> Dear Group,
>
> Is there a more efficient way to create a
Thanks to all three of you for responding. Brilliant answer there,
David - using the options() function as exemplified to set
stringsAsFactors=FALSE universally solved the issue.
Much appreciated, guys.
On 6 October 2010 18:27, David Winsemius wrote:
>
> On Oct 6, 2010, at 1:00 PM, N David Brow
On Oct 6, 2010, at 1:00 PM, N David Brown wrote:
Does anyone know why a data frame created with empty character columns
converts them to integer columns?
Quick answer: it's the strngsAsFactors demon but you have invoked that
demon twice, Once with data.frame and the second rime with rbind.
This should do it:
df <- data.frame(a=character(0), b=character(0), stringsAsFactors=F)
because:
typeof(factor(0))
is "integer"
while:
typeof(character(0))
is "character".
Cheers,
Jeff.
On Wed, Oct 6, 2010 at 1:00 PM, N David Brown wrote:
> Does anyone know why a data frame created with
Try this:
df <- data.frame(a=character(0),b=character(0), stringsAsFactors = FALSE)
df[1,] <- c('a', 'a')
On Wed, Oct 6, 2010 at 2:00 PM, N David Brown wrote:
> Does anyone know why a data frame created with empty character columns
> converts them to integer columns?
>
> > df<-data.frame(a=cha
Jarosław Jasiewicz wrote:
> Hi
> Sorry for banal question
> How to create empty data frame with for example 30 variables without
> typying: data.frame(x=1,y=1)
> Jarek
>
> __
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinf
Try this assuming the first 15 are double and the next 15 are factor:
as.data.frame(rep(list(num = double(0), char = character(0)), each = 15))
2008/2/7 Jarosław Jasiewicz <[EMAIL PROTECTED]>:
> Gabor Grothendieck pisze:
>
> >> data.frame(a = character(0), b = double(0))
> >>
> > [1] a b
> > <0
Gabor Grothendieck pisze:
>> data.frame(a = character(0), b = double(0))
>>
> [1] a b
> <0 rows> (or 0-length row.names)
>
>
> On Feb 7, 2008 5:48 AM, Jarosław Jasiewicz <[EMAIL PROTECTED]> wrote:
>
>> Hi
>> Sorry for banal question
>> How to create empty data frame with for example 30 var
Try this:
do.call(data.frame, as.list(paste("var", 1:30, sep=".")))
On 07/02/2008, Jarosław Jasiewicz <[EMAIL PROTECTED]> wrote:
> Hi
> Sorry for banal question
> How to create empty data frame with for example 30 variables without
> typying: data.frame(x=1,y=1)
> Jarek
>
> _
> data.frame(a = character(0), b = double(0))
[1] a b
<0 rows> (or 0-length row.names)
On Feb 7, 2008 5:48 AM, Jarosław Jasiewicz <[EMAIL PROTECTED]> wrote:
> Hi
> Sorry for banal question
> How to create empty data frame with for example 30 variables without
> typying: data.frame(x=1,y=1)
>
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