Displaying 11 results from an estimated 11 matches for "xt1".
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2008 Sep 04
1
Building a time series.
I have a need to build a time series and there are a couple of aspects about the time series object that are confusing me. First it seems that ts.union is not doing what I would expect. For example:
x0 <- rep(0,10)
x1 <- rep(1,10)
xt0 <- ts(x0, frequency=10)
xt1 <- ts(x1, frequency=10)
st2 <- ts.union(xt0, xt1)
> xt2
Time Series:
Start = c(1, 1)
End = c(1, 10)
Frequency = 10
xt0 xt1
1.0 0 1
1.1 0 1
1.2 0 1
1.3 0 1
1.4 0 1
1.5 0 1
1.6 0 1
1.7 0 1
1.8 0 1
1.9 0 1
> spectrum(xt2)
Error in plot.windo...
2005 May 23
3
Dickey-Fuller Test
Hi All ,
Could you please tell using which library ,Dickey-Fuller Test can be run?
Thanks a lot
__________________________________________________
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2013 Mar 07
2
xts time series object removing time and leaving just the date
I have and XTS time series object that has date and time. I started with 1
minute data and used apply.daily(x, sum) to sum the data to one cumulative
value. This function works just fine however it leaves a time for the last
summed value which looks like this 2006-07-19 14:58:00. I need to just have
the date and to remove the time value of 14:58:00 just leaving the date
value of 2006-07-19 .
2013 Jun 28
0
Help with tables
...algebra.core.formulae 46 TRUE
03/01/2013 11:29 03/01/2013 214173 fdp.percentage_calc_foundation 146 TRUE
",sep="",header=TRUE,stringsAsFactors=FALSE)
?dat2<- data.frame(timestamp=as.POSIXct(paste(dat1[,1],dat1[,2]),format="%m/%d/%Y %H:%M"), dat1[,-c(1:2)])
?library(xts)
xt1<- xts(dat2[,-1],dat2[,1])
library(stringr)
##1st part
?nrow(xt1["2013-03-01 11:15/2013-03-01 11:28"])
#[1] 46
##2nd part
table(xt1["2013-03-01 11:15/2013-03-01 11:28","topic"])
#
#??????? algebra.core.equations????????? algebra.core.formulae
#???????????????????...
2013 Jul 04
2
how to choose dates data?
i have converted my data into date format like below:
> day=as.Date(originaldate,"%m/%d/%Y")
> day[1:5]
[1] "2008-04-12" "2011-07-02" "2011-09-02" "2008-04-12" "2008-04-12"
I wish to select only those observations from 2007 to 2009, how can I
select from this list?
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2006 Jun 12
1
cumulative time durations of specified periods (chron)
...1/03/70 18:00:00) (01/07/70 06:00:00) (01/10/70 18:00:00)
[4] (01/14/70 06:00:00)
and we would like to know how much time is included in a number of
intervals within each event. We can define the intervals with two chron
vectors:
R> (xt0 <- times(c(0.50, 0)))
[1] 12:00:00 00:00:00
R> (xt1 <- times(c(1 - (1 / 86400), 0.25)))
[1] 23:59:59 06:00:00
So for the first event, 01/02/70 06:00:00 to 01/03/70 18:00:00, the
interest is to find how much time corresponds to periods 12:00:00 -
23:59:59 and 00:00:00 - 06:00:00.
I began writing a function to accomplish this task, but am at an...
2013 Jun 23
1
Scaling Statistical
Short question: Is it possible to use statistical tests, like the Augmented
Dickey-Fuller test, in functions with for-loops? If not, are there any
alternative ways to scale measures?
Detailed explanation: I am working with time-series, and I want to flag
curves that are not stationary and which display pulses, trends, or level
shifts.
>df
DATE ID VALUE2012-03-06 1
2013 Sep 26
1
R not ploting lines in the correct order
Hi,
I have a set of x, y points where x represents dates and y actual values. I
am trying to plot a line graph of the data with points on top, but R is
connecting the wrong points with lines. Does anyone know how I can rectify
this. Please see sample below:
x=
24/09/2009 09:13 16/10/2009 11:17 24/10/2009 21:43 11/09/2009
18:34 22/08/2009
15:45 10/08/2009 00:30 14/08/2009 14:52 24/09/2009
2001 Nov 14
0
OPEN ssh pkg
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M5(BP9C<$GSN .=^"T0DT&$-C- G?<">6E)_ 3"#Q.O@)AO,DT<)H\4Q^005,
M#!70.F\#")"%)&-XT1-_L1Q<$WU8 SJ,9U2F.$4B<N,_83 YQZ3HG,X ,&VE
MCG%LPB%5GC8_HUK(&]-95%<S1,I-NLD335?$&F)?[(E-*!*R#OU=LL"-E(?!
MS"'ZR?,TIW2(:V- at K>D\TUD44:=]1'S64W_.3R=0/TV7Y\QJ9#!%L4S4*2;O
M)P+-G_*S?68ET3EP).CI=$\'M"@DT S*/\=8T-!K W2"@M#B^8<VFQ/$;@\4
MJD70AT()...
2008 Jun 30
4
Rebuild of kernel 2.6.9-67.0.20.EL failure
Hello list.
I'm trying to rebuild the 2.6.9.67.0.20.EL kernel, but it fails even without
modifications.
How did I try it?
Created a (non-root) build environment (not a mock )
Installed the kernel.scr.rpm and did a
rpmbuild -ba --target=`uname -m` kernel-2.6.spec 2> prep-err.log | tee
prep-out.log
The build failed at the end:
Processing files: kernel-xenU-devel-2.6.9-67.0.20.EL
Checking
2013 Nov 27
0
Inquiry for Zinc ingots
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Should this item be of interest to you, please feel free to contact me.
Thanks,
Sunshine
Hebei Xingtai chemical Technology Co. ,Ltd
Web:http://www.hbxthg.com
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