Displaying 20 results from an estimated 4000 matches similar to: "Meaning of "lag 0.2, 0.4,..." ?"
2011 Apr 06
2
A zoo related question
Dear all, please consider my following workbook:
library(zoo)
lis1 <- vector('list', length = 2)
lis2 <- vector('list', length = 2)
lis1[[1]] <- zooreg(rnorm(20), start = as.Date("2010-01-01"), frequency = 1)
lis1[[2]] <- zooreg(rnorm(20), start = as.yearmon("2010-01-01"), frequency =
12)
lis2[[1]] <- matrix(1:40, 20)
lis2[[2]] <-
2010 Jul 12
3
How to create sequence in month
Hi all, can anyone please guide me how to create a sequence of months? Here
I have tried following however couldn't get success
> library(zoo)
> seq(as.yearmon("2010-01-01"), as.yearmon("2010-03-01"), by="1 month")
Error in del/by : non-numeric argument to binary operator
What is the correct way to do that?
Thanks for your time.
2009 Sep 25
3
Problem on plotting TS using GGPLOT
Hi, I have following codes :
library(zoo); library(ggplot2); library(plyr)
dat <- rnorm(306); vv <- letters[1:6]; dat1 <- data.frame(dat, vv)
dat2 = zooreg(rnorm(51), as.yearmon(as.Date("2000-01-01")), frequency=12)
ggplot(dat1) +
geom_line(aes(y=dat, x=index(dat2), colour=vv), group=vv, size =
1.3)
However I got error while plotting them :
2010 Apr 18
4
confused with yearmon, xts and maybe zoo
R-listers,
I am using xts with a yearmon index, but am getting some inconsistent
results with the date index when i drop observations (for example by using
na.omit).
The issue is illustrated in the example below. If I start with a monthly
zooreg series starting in 2009, yearmon converts this to "Dec-2008". Not
such a worry for my example, but strange. Having converted to xts, i drop
2010 Nov 23
2
Plot two zoo object with different indexes
Dear R community, I have the following two zoo objects:
MONTHLY CPI
> plot(z)
> par("usr")
[1] 1977.76333 2011.15333 70.39856 227.03744
> z=zooreg(cpius$Value,as.yearmon("1979-11"),frequency=12)
> str(z)
?zooreg? series from Nov 1979 to Oct 2010
Data: num [1:372] 76.2 77 77.8 78.5 79.5 80.3 81.1 82 82 82.6 ...
Index: Class 'yearmon' num [1:372]
2007 Feb 08
2
Newbie: Acf function
Hi, I would like to use acf.plot on a correlogram that is computed
externally. In other words, I would like to "fake out" the acf object.
Is this possible?-- any help would be appreciated.
TIA
Martin
2010 Jul 10
7
Need help on date calculation
Hi all, please see my code:
> library(zoo)
> a <- as.yearmon("March-2010", "%B-%Y")
> b <- as.yearmon("May-2010", "%B-%Y")
>
> nn <- (b-a)*12 # number of months in between them
> nn
[1] 2
> as.integer(nn)
[1] 1
What is the correct way to find the number of months between "a" and "b",
still
2011 Sep 22
2
Subsetting a zooreg object using window / subset
Dear R users,
I am currently working in subsetting a zooreg() object using either window or subset. I have a solution but it may be a bit cumbersome when I start working with actual data. Your inputs would be greatly appreciated.
Example: I have a zooreg() object that starts in 1997 and ends in 2001. This object contains daily data for the 4 years
2010 Jul 07
3
Need help in handling date
Dear all, I have a date related question. Suppose I have a character string
"March-2009", how I can convert it to a valid date object like
as.yearmon("2009-01-03") in the zoo package? Is there any possibility there?
Ans secondly is there any R function which will give the names of of all
months as "LETTERS" does?
Thanks for your time.
[[alternative HTML version
2010 Jan 01
1
Chainging monthly data to daily data
Hi, I have a zoo object with monthly frequency :
library(zoo)
dat <- zooreg(rnorm(50), as.yearmon("2000-01-01"), frequency=12)
Now I want to make a zoo object with daily frequency from "dat" wherein
value for a each day for a particular month will be value of "dat" at that
particular month.
Is there any easy way to do that?
Thanks,
--
View this message in
2009 Jul 01
1
A problem on zoo object
I have a zoo object on daily data for 10 years. Now I want to create a list,
wherein each member of that list is the monthly observations. For example,
1st member of list contains daily observation of 1st month, 2nd member
contains daily observation of 2nd month etc.
Then for a particular month, I want to divide all observations into 3 parts
(arbitrary) and then want to calculate some statistics
2007 Sep 20
1
Time series graphs, question about using zoo
Hi,
Can you tell me what is the meaning for "tail, 1" in "aggregate"?
I also want to get some similar graph, but the data is not time series data.
Suppose here is my data one, I want a graph with x-axis is just the
index(1:9).
The graph plot all the variable A, B,C,D. So there should be 4 lines for
each graph. For the A line, at each time point, the letter A should be on
2009 Sep 24
2
Downloading data from from internet
Hi all,
I want to download data from those two different sources, directly into R :
http://www.rateinflation.com/consumer-price-index/usa-cpi.php
http://eaindustry.nic.in/asp2/list_d.asp
First one is CPI of US and 2nd one is WPI of India. Can anyone please give
any clue how to download them directly into R. I want to make them zoo
object for further analysis.
Thanks,
--
View this message in
2012 Dec 10
1
Can somebody suggest how to achieve following data manipulation?
Dear all,
Let say I have following data:
RawData <- matrix(1:101, nr = 1); colnames(RawData) <- c("ASD",
as.character(as.yearmon(seq(as.Date("2012-03-01"), length.out = 100, by
= "1 month")))); rownames(RawData) <- "XYZ"
CutOffDate <- as.Date("2012-09-01")
NewDateSeries <- as.character(as.yearmon(seq(CutOffDate, to =
2011 Feb 16
1
Timeseries Data Plotted as Monthly Boxplots
Hello, I'm trying to develop a box plot of time series data to look at the
range in the data values over the entire period of record.
My data initially starts out as a list of hourly data, and then I've been
using this code to make this data into the final ts array.
# Read in the station list
stn.list <- read.csv("/home/kbennett/fews/stnlist3", as.is=T, header=F)
# Read in
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 =
2011 Jan 21
3
How to look into the asterisked function?
Hi friends, there is methods() function to see the all available methods for
a particular function, for example:
> head(methods("print"))
[1] "print.acf" "print.anova" "print.aov" "print.aovlist"
"print.ar" "print.Arima"
In this list, there are some functions which are asterisked like
print.acf().
2005 May 10
1
Aggregate lag
hello,
Does anybody know how to aggregate a lag series ?
when I try to use aggregate I get the following message
> try<-ts(1:100,start=c(1985,1),freq=12)
> aggregate(try,4,mean,na.rm=T)
Qtr1 Qtr2 Qtr3 Qtr4
1985 2 5 8 11
1986 14 17 20 23
1987 26 29 32 35
1988 38 41 44 47
1989 50 53 56 59
1990 62 65 68 71
1991 74 77 80 83
1992
2002 Apr 11
3
new acf package
I'm a PhD student and I'm working with covariance function. I'm interested
to know if exist some packages in R to calculate and plot the
bidimensional Autocovariance Function. the input matrix is a matrix that
describe a spatial location over a 2-D space and I want to use it in the
same way I can use a time serie in the 1-D acf.
Thanks,
Nicola.
2002 Apr 11
3
new acf package
I'm a PhD student and I'm working with covariance function. I'm interested
to know if exist some packages in R to calculate and plot the
bidimensional Autocovariance Function. the input matrix is a matrix that
describe a spatial location over a 2-D space and I want to use it in the
same way I can use a time serie in the 1-D acf.
Thanks,
Nicola.