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...> z1 <- read.zoo("all.csv", sep = ",", header = TRUE, FUN = fmt.chron) #this part works just fine and I can plot and analyze data till my hearts content I need to replace NA (~700,000+) with the numeric value 9999 for a beam forming exercise that we are conducting with a geophysicist in matlab. I can't get it into excel in the present form because it is too big. I was wondering if there was an easy way to do such a thing in R? I tried the following: dat <- sapply(z1, function(x) {x[is.na(x)] <- 9999; x}) and I got the following error: Error in array(unlist(answe...

Hi, Is there a function under R that does principal component analysis and then use the selected eignevectors to filter the data and transform back to the original coordinates? If there isn't, can someone guide as to how to do this approach. Much appreciated. Sami Saad El Kurdy SENIOR GEOPHYSICIST, NFD/1 Reservoir & Fields Development Department North Field Development Staff Number: 20504 Tel: 974 449 1247 Email: elkurdy at qp.com.qa -------------------------------------------------------------------------------------------------- Confidentiality Notice : This e-mail and...

Hi I have put up some web pages containing a number of plots (and diagrams) produced using R (they correspond to the figures for a book that I am working on about R graphics), with the relevant R code provided for each plot (or diagram), at http://www.stat.auckland.ac.nz/~paul/RGraphics/rgraphics.html Hope these are of some help/use; comments/suggestions welcome. Paul -- Dr Paul Murrell

To all: I currently download the R binaries for Redhat 7.x Linux. There is considerable turmoil in the vendors of Linux. Redhat apparently is changing it's business model to paid versions. This might motivate my department to use a different vendor of Linux. Is there anything predictable about which vendors/versions of Linux will have R binaries in the future? Thanks, Nathan PS I

Hi everyone, first of all, I would like to say that I am a newbie in R, so I apologize in advance if my questions seem to be too easy for you. Well, I'm looking for periodicity in histograms. I have histograms of certain phenomenons and I'm asking whether a periodicity exists in these data. So, I make a periodogram with the function spec.pgram. For instance, if I have a histogram h, I