Displaying 20 results from an estimated 1000 matches similar to: "xts plot behavior"
2011 Jan 04
1
XTS : merge.xts seems to have problem with character vectors
Hi,
Please can you tell me what I am doing wrong. When trying to merge two xts
objects, one of which has multiple character vectors for columns...I am just
getting NAs.
> str(t)
POSIXct[1:1], format: "2011-01-04 11:45:37"
> y2 = xts(matrix(c(letters[1:10]),5), order.by=as.POSIXct(c(t + 1:5)))
> names(y2) = c(1,2)
> y2
1 2
2011-01-04 11:45:38
1995 May 24
4
Drivers for FORE systems cards under FreeBSD
I had originally mentioned this only to 2 people, which was Jordan
K. Hubbard and Paul Henning-Kemp, but since I have received a lot of
queries on this, I thought I might as well post it on the FreeBSD announce
groups.
Included below is a posting done on the Linux-atm mailing group, by
Pragnesh Sampat. I have just adapted for FreeBSD.
RV
-------------------------- Announcement
2009 Nov 10
3
NetCDF output in R
Dear CSAG R users,
I will be glad if someone can point out what I am doing wrong or not doing at all in this.
I am trying to write out netcdf file in R. I have 26 time step but only the first time step is written.
For example:
>library(ncdf)
>path <- '/home/work/'
>forecast <- open.ncdf(paste(path,'cam.1980.2005.nc',sep=""))
> fore <-
2009 Nov 10
3
NetCDF output in R
Dear CSAG R users,
I will be glad if someone can point out what I am doing wrong or not doing at all in this.
I am trying to write out netcdf file in R. I have 26 time step but only the first time step is written.
For example:
>library(ncdf)
>path <- '/home/work/'
>forecast <- open.ncdf(paste(path,'cam.1980.2005.nc',sep=""))
> fore <-
2010 Mar 17
1
Reg GARCH+ARIMA
Hi,
Although my doubt is pretty,as i m not from stats background i am not sure
how to proceed on this.
Currently i am doing a forecasting.I used ARIMA to forecast and time series
was volatile i used garchFit for residuals.
How to use the output of Garch to correct the forecasted values from ARIMA.
Here is my code:
###delta is the data
fit<-arima(delta,order=c(2,,0,1))
fit.res <-
2009 Nov 16
0
OCaml-R and xts works!
Hi.
I've managed to make a *very* simple wrapper around the xts library for
R into OCaml. (Need to be downloaded from CRAN for OCaml users, but I
expect other wrapping to be fairly similar...). The good, good, good
thing (from my humble point of view) is that all loading is done
statically: Loading the R interpreter is done statically. Loading the
xts library is done statically... etc...
2010 Aug 17
0
Merge xts
Hi all ,
I have 12 xts objects of differing timeseries stamp. For example :
> str(s1_predict.xts)
An ?xts? object from 1990-03-25 20:00:00 to 1990-12-15 09:00:00 containing:
Data: num [1:725, 1] 11.23 10.18 9.3 9.74 10.18 ...
- attr(*, "dimnames")=List of 2
..$ : NULL
..$ : NULL
Indexed by objects of class: [POSIXt,POSIXct] TZ:
Original class: 'double'
xts
2011 Nov 09
1
Are there equivalents to xblocks or rect that can be used with plot.xts?
I would like to add vertical shaded blocks in plot.xts graphs (like recession
periods in FRED graphs)
The reason I use plot.xts instead of plot.zoo is that I like the fact that
the grid is automatically aligned with major ticks in plot.xts.
xblocks() and rect() do not seem to work with plot.xts (only with plot.zoo).
Are there any alternative methods that work with plot.xts?
Thanks.
--
View
2010 Dec 06
1
as.xts error
Dear all,
I am using the as.xts function to transfer a data frame to the xts
The following is the code and result:
a<-read.csv("price.csv")
a$Date<-as.POSIXct(a$Date)
str(a)
'data.frame': 15637 obs. of 2 variables:
$ Date : POSIXct, format: "2010-01-04 09:45:01" "2010-01-04 09:45:02"
"2010-01-04 09:45:03" ...
$ bid_hsi: int 21850
2011 Dec 24
1
Optimising timeboxing in xts
I don't know if timeboxing is the correct term to use to accomplish
what I'm attempting, so allow me to explain. I have a set n of tagged
observations in time series t. What I'm interested in is taking i
seconds before and after every n. My code is below:
# observations.xts is an xts time series and arg is the number of
seconds to for the timebox
timeboxes <-
2009 Mar 08
0
ARIMA second order differencing problem
Hi,
I have been using this site (
http://www.stat.pitt.edu/stoffer/tsa2/Rissues.htm) to help me with some
ARIMA modelling in R.
Unfortunately the methods mentioned do not appear to work with second order
differencing; arima(*, 2, *).
I have used some dummy data to illustrate my point.
When I use the xreg=... method, the estimate of intercept is *way* off. This
can be seen by the high s.e but I
2011 Oct 08
1
Filling missing days in xts time series
Hi,
I have a bunch of irregularly spaced xts time series (with a POSIX index),
and I'm trying to write a function that fillls the missing days. Using a
solution suggested by Gabor Grothendieck for zoo, I wrote the following:
# FD: Fill missing days
FD<-function(ser) {rng<-range(time(ser))
> temp<-merge(ser,xts(,seq(rng[1],rng[2],"day")))
>
2013 May 13
1
Math problem with xts objects
Hello,
I coming across a strange problem doing math on an xts object.
If I have an xts object of stock prices (perhaps 5 minute bars of open, high, low,close) and want to do some math, the results fail.
For example:
d$close[10] - d$open[10] works perfectly
d$close[10] - d$open[9] fails. I just get an answer of "numeric(0) Index: numeric(0)".
My guess is that xts is breaking
2011 Mar 07
1
Associating the day of week to a daily xts object
I have the following xts objetct "temp"
> str(temp)
An ?xts? object from 2010-12-26 to 2011-03-05 containing:
Data: num [1:70, 1] 2.95 0.852 -0.139 1.347 2.485 ...
- attr(*, "dimnames")=List of 2
..$ : NULL
..$ : chr "t_n"
Indexed by objects of class: [POSIXct,POSIXt] TZ: GMT
xts Attributes:
NULL
> temp
t_n
2010-12-26
2017 Oct 06
2
Time series: xts/zoo object at annual (yearly) frequency
Hi,
I'd like to make a time series at an annual frequency.
> a<-xts(x=c(2,4,5), order.by=c("1991","1992","1993"))
Error in xts(x = c(2, 4, 5), order.by = c("1991", "1992", "1993")) :
order.by requires an appropriate time-based object
> a<-xts(x=c(2,4,5), order.by=1991:1993)
Error in xts(x = c(2, 4, 5), order.by =
2009 Jun 25
1
apply on xts
Hi,
I do not understand why after I called apply on a function that returns an
xts (getIdvAdjSeries) it returns a matrix whose columns are just numeric
value of time series in xts instead of a list of xts objects.
Basically, I called the following:
apply(matrix(tickers,ncol=1),1,FUN=getDivAdjSeries)
getDivAdjSeries <- function(ticker) {
seriesName <-
2012 Dec 18
1
How to draw frequency domain plot with xts time series data
Hello,
I'd like to convert the below time-series data with fft or wavelet related function and plot it.
Could you let me know
1. How to convert xts data frame format to list format ?
2. How to plot fft or wavelet diagram ?
Here is the data :
> class(zc)
[1] "xts" "zoo"
> str(zc)
An ‘xts’ object from (10/15/12 09:00:00) to (10/15/12 15:15:00)
2011 Jul 30
1
Plot.xts - how to change the x-axis labels to show weekly labels.
Dear R-users
I am new to R and struggling not to bother the list with silly questions.
I read the documentation on xts and searched for some examples over the
internet on how to use plot.xts.
The xts object is as follows
dataxts : An 'xts' object from 2010-06-27 to 2010-08-05 containing:
Data: num [1:56161, 1:14] 74 74.2 74.2 74.1 73.9 ...
Indexed by objects of
2009 Sep 25
0
differing behaviour between xts (0.6-7) and zoo (1.5-8)
Folks,
I have some weekly dataseries that I convert to monthly xts (with
yearmon indices), and obtain the two following extracts:
> str(sig)
An 'xts' object from Apr 1998 to Sep 1998 containing:
Data: num [1:6, 1] 0.0083 0.2799 -0.2524 -0.0119 0.18 ...
- attr(*, "dimnames")=List of 2
..$ : NULL
..$ : chr "e1"
Indexed by objects of class: [yearmon] TZ:
2012 Mar 04
1
Store vectors as values in xts time-series object
Hi R programmers,
I have stumbled across what seems a very simple problem. My goal is to
create a xts time series object which contains vectors as values. In
other words, I try to create something like this:
2009-01-01 => c('aa', 'bb', 'dd')
...
2010-02-01 => c('mm')
I have figured out parts of separately. Here's what works (new xts
time-series with