Re: [R] xts POSIXct index format
Hi David,
On Sat, Mar 5, 2011 at 11:00 PM, David Winsemius wrote:
>
> On Mar 5, 2011, at 11:28 AM, Joshua Ulrich wrote:
>
>> Hi Chris,
>>
>> Perhaps something like this?
>>
>> require(xts)
>> ds <- options(digits.secs=6) # so we can see sub-seconds
>> x <- xts(1:10, as.POSIXct("2011-01-21") + c(1,1,1,2:8)/1e3)
>> x
>> indexFormat(x) <- "%H:%M:%OS3"
>> x
>>
>
> Joshua;
>
> Does your reading of help(indexFormat) lead you to that suggestion? When I
I didn't read the documentation. I remembered the functionality from
conversations with Jeff Ryan.
> read it I thought that indexFormat would only accept onoe of " Date,
> POSIXct, chron,yearmon, yearqtr or timeDate." Those were the formats
Those are the classes available to use with indexClass<-, which
controls the class returned by index().
> mentioned in the immediately preceding paragraph. I went to the help page
> hoping I would be told I could use format strings but left it thinking that
> I could only specify format classes.
>
We could probably make the use of format strings more explicit (via an
example?). Do you have any suggestions to help clarify the prose?
> --
> David
>
>
Best,
--
Joshua Ulrich | FOSS Trading: www.fosstrading.com
>> Hope that helps,
>> --
>> Joshua Ulrich | FOSS Trading: www.fosstrading.com
>>
>>
>>
>> On Fri, Mar 4, 2011 at 5:57 PM, rivercode wrote:
>>>
>>> Hi,
>>>
>>> I cannot figure out how to change the index format when displaying
>>> POSIXct
>>> objects.
>>>
>>> Would like the xts index to display as %H:%M:%OS3 when doing viewing the
>>> xts
>>> object.
>>>
>>> Think I am missing the obvious.
>>>
>>> Cheers,
>>> Chris
>>>
>>> --
>>> View this message in context:
>>> http://r.789695.n4.nabble.com/xts-POSIXct-index-format-tp3336136p3336136.html
>>> Sent from the R help mailing list archive at Nabble.com.
>>>
>>> __
>>> R-help@r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide
>>> http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>>
>>
>> __
>> R-help@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
> David Winsemius, MD
> Heritage Laboratories
> West Hartford, CT
>
>
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] xts POSIXct index format
On Mar 5, 2011, at 11:28 AM, Joshua Ulrich wrote:
Hi Chris,
Perhaps something like this?
require(xts)
ds <- options(digits.secs=6) # so we can see sub-seconds
x <- xts(1:10, as.POSIXct("2011-01-21") + c(1,1,1,2:8)/1e3)
x
indexFormat(x) <- "%H:%M:%OS3"
x
Joshua;
Does your reading of help(indexFormat) lead you to that suggestion?
When I read it I thought that indexFormat would only accept onoe of "
Date, POSIXct, chron,yearmon, yearqtr or timeDate." Those were the
formats mentioned in the immediately preceding paragraph. I went to
the help page hoping I would be told I could use format strings but
left it thinking that I could only specify format classes.
--
David
Hope that helps,
--
Joshua Ulrich | FOSS Trading: www.fosstrading.com
On Fri, Mar 4, 2011 at 5:57 PM, rivercode wrote:
Hi,
I cannot figure out how to change the index format when displaying
POSIXct
objects.
Would like the xts index to display as %H:%M:%OS3 when doing
viewing the xts
object.
Think I am missing the obvious.
Cheers,
Chris
--
View this message in context:
http://r.789695.n4.nabble.com/xts-POSIXct-index-format-tp3336136p3336136.html
Sent from the R help mailing list archive at Nabble.com.
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] xts POSIXct index format
Thank you for your help. indexFormat(x) solved the problem nicely. > head(a) 2011-03-04 09:30:00.0 22.10 2011-03-04 09:30:00.1 22.09 2011-03-04 09:30:00.2 22.10 2011-03-04 09:30:00.3 22.09 2011-03-04 09:30:00.4 22.10 2011-03-04 09:30:00.5 22.09 > indexFormat(a) <- "%H:%M:%OS3" > head(a) 09:30:00.000 22.10 09:30:00.100 22.09 09:30:00.200 22.10 09:30:00.300 22.09 09:30:00.400 22.10 09:30:00.500 22.09 -- View this message in context: http://r.789695.n4.nabble.com/xts-POSIXct-index-format-tp3336136p3337167.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] xts POSIXct index format
Hi Chris,
Perhaps something like this?
require(xts)
ds <- options(digits.secs=6) # so we can see sub-seconds
x <- xts(1:10, as.POSIXct("2011-01-21") + c(1,1,1,2:8)/1e3)
x
indexFormat(x) <- "%H:%M:%OS3"
x
Hope that helps,
--
Joshua Ulrich | FOSS Trading: www.fosstrading.com
On Fri, Mar 4, 2011 at 5:57 PM, rivercode wrote:
> Hi,
>
> I cannot figure out how to change the index format when displaying POSIXct
> objects.
>
> Would like the xts index to display as %H:%M:%OS3 when doing viewing the xts
> object.
>
> Think I am missing the obvious.
>
> Cheers,
> Chris
>
> --
> View this message in context:
> http://r.789695.n4.nabble.com/xts-POSIXct-index-format-tp3336136p3336136.html
> Sent from the R help mailing list archive at Nabble.com.
>
> __
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] xts POSIXct index format
On Mar 4, 2011, at 6:57 PM, rivercode wrote:
Hi,
I cannot figure out how to change the index format when displaying
POSIXct
objects.
Would like the xts index to display as %H:%M:%OS3 when doing viewing
the xts
object.
If you are not satisfied with the default format, you have (at least)
two options:
a) specify a format when you call print
b) redefine the default.
The default is determined within the print.xts function by a call to
indexFormat
> indexFormat
function (x)
{
attr(x, ".indexFORMAT")
}
So it looks as though you would need to either replace indexFormat or
change the attribute of your xts objects. Read further at:
?indexFormat
Think I am missing the obvious.
If you mean looking at the source code, then perhaps you were missing
the obvious, or at least merely readily accessible. I don't actually
see the option of including a format string in the attribute, so
modifying the function may be needed.
--
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
