similar to: Filtering

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Hello to all, How can I make R read the data from an Excel sheet? thanks, ozlem [[alternative HTML version deleted]]

Hi useRs, I am trying to calculate the Sharpe ratio with "sharpe" of the library "tseries". The documentation requires the univariate time series to be a portfolio's cumulated returns. In this case, the example given data(EuStockMarkets) dax <- log(EuStockMarkets[,"FTSE"]) is however not the cumulated returns but rather the daily returns of the FTSE

I have two chromatograms I want plotted on the same axes. I would like the plots to be transparent, so the first chart is not obscured. I have tried adjustcolor(..., alpha.f=0.3), the problem is that my chromatogram is so dense with datapoints that they overlap and the entire graph just ends up a solid color. The second histogram still obscures the first. Consider this example: col1 <-

Hi, I would like to use R to estimate the following model: X(t) = a + b1*X(t-1) + b2*X(t-2) + c1*Y(t) + c2*Y(t-1) + c3*Y(t-2) Is there any R function that performs this type of estimation? I know that if I only have one time series (i.e. lagged value of X) on the right hand side then there are R functions to do the estimation. I am thinking a work around by preparing X(t-1), X(t-2),Y(t),Y(t-1)

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I have the following simple for-loop, which makes R crash every time. The length of the vectors is about 1200 rows, 1 column. n = max(length(GSPC),length(FTSE)) for(i in 1:1000) { if (row.names(GSPC)[i]==row.names(FTSE)[i]){ } else { if (row.names(GSPC)[i]>row.names(FTSE)[i]){ GSPC<-rbind(GSPC[1:(i-1),],GSPC[(i-1):length(GSPC),]) row.names(GSPC)[i]=row.names(FTSE)[i] } else {

Dear All, There is an example for the priceIts function (the its package) which does not work for me as expected. > ?priceIts > x1 <- priceIts(instrument = c("^ftse"), start = "1998-01-01", + quote = "Close") Error in validObject(.Object) : invalid class "its" object: Missing values in dates > x2 <-

Dear all, I am looking for a way to work out if a file on the internet exists before attempting to download it using the function download.file(). For example, using a url that does not exist url <- "http://finance.yahoo.com/ftse.csv" destfile <- tempfile() download.file(url = url, destfile = destfile) # gives the following response ... trying URL

Hi, I have two connections to the Internet. I implemented the load balancing as described in chapter 4.2 "Routing for multiple uplinks/providers" The problem that occurred is that the client applications like Yahoo Messenger or even PuTTY (SSH client) are loosing the connection very often. Does anyone experienced this problem? Does anyone knows an workaround for this problem?

I'm trying to use garchFit from fSeries, with Student or Skewed Student conditionnal distribution. Let's say that eps (vector) is my series of daily log-returns: data(EuStockMarkets) eps = diff(log(EuStockMarkets[,"CAC"])) library(fSeries) g = garchFit(series = eps, formula.var = ~garch(2,2), cond.dist = "dstd") s = g at fit$series All the coefficients are ok

Hi I have a few problems with tail/head when applied to multiple time series. I'm not sure as whether I did not understand the function or whether it correspond to an unexpected behavior. When head(a,n) is applied on data.frame or matrix, it returns a data-frame or matrix with first n obs of *each* variable. When applied to a mts object, it returns first n obs of *first* variable only,

Dear list-reader, by running the following script: library(zoo) sessionInfo() search() packageDescription("zoo") data(EuStockMarkets) dax <- as.zoo(EuStockMarkets[1:10, "DAX"]) daxr <- diff(log(dax)) identical(as.vector(qnorm(daxr)), qnorm(coredata(daxr))) qqnorm(coredata(daxr)) qqnorm(daxr) qqnorm() produces an error: > qqnorm(daxr) Fehler in if (xi == xj) 0L

https://bugs.freedesktop.org/show_bug.cgi?id=57777 Priority: medium Bug ID: 57777 Assignee: nouveau at lists.freedesktop.org Summary: lcd screen of a laptop does not wake up after sleep QA Contact: xorg-team at lists.x.org Severity: normal Classification: Unclassified OS: All Reporter: alinm.elena at

Hi I''ve a stupid question. How can I shape upload using IMQ? Instead of putting a rule in iptables in PREROUTING should i use POSTROUTING? And another question is, can I make routing rule based on ip addresses assigned by iptables to an imq device? The idea is, let''s say i have some rules in iptables like: -t mangle -A PREROUTING -s 192.168.0.0/16 -j IMQ --todev 0 Can i route

Hi, This is the first time I've come across this: pid 11415 (ipfw), uid 0: exited on signal 11 (core dumped) The core dump landed in root's home directory in one of my jails. Has anyone seen this before? Should I be concerned? chkrootkit says nothing. (How trustworthy is its output? ;-) Thanks. Cheers. -- Ng Pheng Siong <ngps@netmemetic.com> http://firewall.rulemaker.net