Displaying 20 results from an estimated 2000 matches similar to: "Calculating quarterly statistics for time series object"
2008 Mar 10
1
Error in extracting monthly observation from a daily time series data
Hi all,
Suppose I have following dataset :
library(zoo)
SD = 1
date1 = seq(as.Date("01/01/90", format = "%m/%d/%y"), as.Date("12/31/08", format = "%m/%d/%y"), by = 1)
len1 = length(date1); data1 = zoo(matrix(rnorm(len1, mean=0, sd=SD*0.5), nrow = len1), date1)
Now I want to extract monthly observation.
obs =
2018 Jan 28
2
Plotting quarterly time series
I have a data set with quarterly time series for several variables. The
time index is recorded in column 1 of the dataframe as a character vector
"Q1 1961", "Q2 1961","Q3 1961", "Q4 1961", "Q1 1962", etc. I want to
produce line plots with ggplot2, but it seems I need to convert the time
index from character to date class. Is that right? If so, how
2018 Jan 28
0
Plotting quarterly time series
On Sun, 28 Jan 2018, phil at philipsmith.ca wrote:
> I have a data set with quarterly time series for several variables. The
> time index is recorded in column 1 of the dataframe as a character
> vector "Q1 1961", "Q2 1961","Q3 1961", "Q4 1961", "Q1 1962", etc. I want
> to produce line plots with ggplot2, but it seems I need to
2018 Jan 28
1
Plotting quarterly time series
Using Achim's d this also works to generate z where FUN is a function used
to transform the index column and format is also passed to FUN.
z <- read.zoo(d, index = "time", FUN = as.yearqtr, format = "Q%q %Y")
On Sun, Jan 28, 2018 at 4:53 PM, Achim Zeileis <Achim.Zeileis at uibk.ac.at> wrote:
> On Sun, 28 Jan 2018, phil at philipsmith.ca wrote:
>
>> I
2008 May 31
1
Representing 'Date' as 'Year - Quarter'
I have financial data on a a set of firms, with a quarterly period
(fundamental data). The data spans 10 years, and four quarters per
year. The present file (.csv) reads the Date columns as "200706" for
the second quarter of 2007; "199809" for the third quarter of 1997.
Is there a way I can convert it to something like "2007 Q2", "1998 Q3"?
I am aware of
2009 Jul 11
2
Date conversions
Hi all,
I'm having a little bit of trouble with some date conversions and
am hoping someone can help me out. Thanks in advance.
OK, I have two sources of data that provide date info in a csv file
differently. I've attached a small zipped file with two text files
that illustrate both. (Is it ok to send attachments to this list? Not
sure. It's very small.) I need to be able to
2008 Apr 23
3
Writing list object to a file
Hi all,
I am wondering how to write a 'list' object to a file. I already gone
through some threads like
http://mail.python.org/pipermail/python-list/2001-April/080639.html, however
could not trace out any reliable solution. I tried following :
> write.table(calc, file="c:/data.csv")
Error in data.frame("200501" = c(-0.000387071806652095,
-0.000387221689252648, :
2012 Nov 10
4
help on date dataset
Hi everybody,
I am beginer in R and I need your precious help.
I want to create a small function in R as in sas to retrieve date.
I have a file with data that import in R.
DATE PAYS nb_pays.ILI.
1 24/04/2009 usa 0
2 24/04/2009 usa 0
3 24/04/2009 Mexique 0
4 24/04/2009
2008 Jan 02
3
Find missing days
Hi,
I have a data.frame like this:
y <- rnorm(60)
lev <- gl(3,20, labels=paste("lev", 1:3, sep=""))
date1 <- as.Date(seq(ISOdate(2007,9,1), ISOdate(2007,11,5),
by=60*60*24))
date1 <- date1[-c(3,4,15,34,38,40)]
df <- data.frame(lev=lev, date1=date1, y=y)
I would like to produce a new data.frame with missing days in df$date1
in each df$lev, like this:
lev
2005 Feb 24
2
Row median of Date class variables in a data frame
I am trying to calculate the median of each row of a
data frame where the data frame consist of
columns of class Date.
Below are my test data and best attempt at using apply.
I didn't see a solution via Google or the Baron search
site.
I'd be grateful for any suggestions or solutions.
I'm using R 2.0.0 on Mac OS X.
Thank you,
Stephen Weigand
### Test data
date1 <- c(1000,
2009 Jan 21
3
Error as.Date on Invalid Dates
Hi All,
I have an script in R which accepts user inputs for certain parameters,
particularly dates, which the user inputs as character strings.
eg:
> date1 <- "2009-01-21"
The script later parses the input via the as.Date function:
> as.Date(date1)
However, as.Date encounters an error when the string does not represent an
actual date.
eg:
> date1 <-
2013 Feb 19
1
data format
Hi,
Try this:
el<- read.csv("el.csv",header=TRUE,sep="\t",stringsAsFactors=FALSE)
?elsplit<- split(el,el$st)
?
datetrial<-data.frame(date1=seq.Date(as.Date("1930.1.1",format="%Y.%m.%d"),as.Date("2010.12.31",format="%Y.%m.%d"),by="day"))
elsplit1<- lapply(elsplit,function(x)
2015 Nov 06
4
Puzzled by eval
I am currently puzzled by a seach path behavior. I have a library of a dozen routines
getlabs(), getssn(), getecg(), ... that interface to local repositories and pull back
patient information. All have a the first 6 arguments in common, and immediately call a
second routine to do initial processing of these 6. The functions "joe" and "fred" below
capture the relevant
2009 Dec 09
1
reshape() makes R run out of memory (PR#14121)
Full_Name: Alexander L. Belikoff
Version: 2.8.1
OS: Ubuntu 9.04 (x86_64)
Submission from: (NULL) (67.244.71.200)
I'm trying to reshape the following data frame:
ID DATE1 DATE2 VALUE_TYPE VALUE
'abcd1233' 2009-11-12 2009-12-23 'TYPE1' 123.45
...
VALUE_TYPE is a string and is a factor with only 2 values
2012 May 12
1
Query regarding date as argument in functions - and about sqldf
Hi,
I have a query about sqldf, and dates in general. I couldnt find much on
the net or on the forums, hence I am here. Here is the issue:
I want to write a function that accepts 3 arguments: date1, date2 and a
dataframe, say 'df'. Within the function, I want to populate a temp
dataframe which essentially contains the output of the query "select * from
df where DATE between date1
2005 Sep 22
1
problem with dates
I Have been trying to convert a vector of dates into julian dates using the following commands: as.date & as.numeric. I can convert a date no problem by doing the following:
as.numeric (as.date ("9/21/2004"))
but as soon as I try to do an entire vector I am given the following:
as.numeric (as.date(date1))
Error in as.date(date1) : Cannot coerce to date format
I have tried
2012 Mar 07
1
date columns chooser
i have a data frame with 2 columns of dates.
with str(dataframe) i have ensured myself that they were indeed formatted
as dates.
one column has NA's in it.
the aim is now to make a third column that chooses date1 if it is a date,
and choose date2 if it is a NA.
i am trying
df$date3=ifelse(is.na(df$date1), df$date2, df$date1).
this leads to unexpected behaviour: the resulting column is
2013 Feb 13
3
date and matrices
Hi Elisa,
Try this:
date1<-format(seq.Date(as.Date("1991.1.1",format="%Y.%m.%d"),as.Date("1996.12.31",format="%Y.%m.%d"),by="day"),"%Y.%m.%d")
?length(date1)
#[1] 2192
mat1<-matrix(c(.314,.314,.273,.273,.236,.236,.236,.236,.273,.314,.403,.314),ncol=1)
res1<-
2006 Dec 28
3
Dates in R
Hello all,
Can somebody point me to references or provide some code on dealing with
this date issue. Basically, I have two vectors of values that represent
dates. I want to convert these values into a date format and subtract the
differences to show elapsed time in days. More specifically, here is the
example:
Date1 Date2
032398 061585
032398 061585
111694 101994
111694
2013 Oct 15
2
Data handling
Hello all,
I'm having a problem with data handling. My input data is (dput in the
after the signature):
Date Time Fraction
06/19/13 22:15:39 0.3205
06/19/13 22:15:44 0.3205
06/19/13 22:15:49 0.3205
06/19/13 22:15:54 0.3205
06/19/13 22:15:59 0.3205
06/19/13 22:16:09 0.3205
Date in format month/day/year, Time in HH:MM:SS and fraction represents the
fractions of