similar to: is.na(v)<-b (was: Re: Beginner's query - segmentation fault)

Concerning x[i] <- NA vs is.na(x[i]) <- TRUE Brian Ripley wrote: I don't think it can ever `go wrong', but it can do things other than the user intends. If the user writes x[i] <- NA, the user has clearly indicated his intention that the i element(s) of x should become NA. There isn't any clearer way to say that. The only way it could ever do something "other

Note this behaviour: > a<-"a" > a<-NA > mode(a) [1] "logical" > a<-"a" > is.na(a) <- T > mode(a) [1] "character" However after either way of assigning NA to a, is.na(a) is true, and it prints as NA, so I can't see it's ever likely to matter. [Why do I say these things? Expect usual flood of examples where it does

Well, that's a convincing argument, but maybe it's the name that's worrying some of us. Maybe it would be more intuitive if called set.na (sorry, I mean setNA). Also "is.na<-" cannot be used to create a new variable of NAs, so is not a universal method, which is a shame for its advocates. I note also that for a vector you can assign a new NA using either TRUE or

> -----Original Message----- > From: Richard A. O'Keefe [mailto:ok at cs.otago.ac.nz] <snip> > The very existence of an "is.na<-" which accepts a logical > vector containing FALSE as well as TRUE ... And don't forget this is not the only usage of is.na<-. In fact it is designed to take any valid indexing value. For example: > a<-1:10 >

I think the thread ended up with several people (not only me) feeling certain they didn't like `is.na<-` but with the developers defending it and me not really understanding why. Uwe Ligges was going to come up with an example of `<- NA` going wrong (sorry Brian R, I mean behaving unexpectedly), but never did, and I think the problem has been fixed. It was apparently a problem with

I got some advice from Rick last night and started coding this handler to allow for time-based secure downloading similar to mod_secdownload that lighttpd offers. I got most of the code in the handler worked out and packaged into a gem but am still having the following problems: 1) I have a configuration script as follows require ''mongrel'' config = Mongrel::Configurator.new

When I run R CMD check on a package I have recently started work on I get the following: * checking R code for possible problems ... NOTE addlinear: no visible binding for global variable 'x' I appreciate that this is only a NOTE and so I assume is R's equivalent of 'This is perfectly legal but I wonder whether it is really what you intended' but I would like to understand

Compile with -O3 -m32 (see <https://godbolt.org/z/yCpBpM>): long lsign(long x) { return (x > 0) - (x < 0); } long long llsign(long long x) { return (x > 0) - (x < 0); } While the code generated for the "long" version of this function is quite OK, the code for the "long long" version misses an obvious optimisation: lsign: # @lsign mov

Hey all, Working slowly on getting the myriad number of parts to my fax system plan together, and one of the pieces I want to nail is how to go about, for the outbound context (fax-out) pre-pending a digit onto a number? I.e., for all my testing right now, I've been dialing '91XXXXXXXXXX', as the asterisk server doing faxing junctions into my old Rolm CBX switch, and so I need the

Typically (or at least somewhat occasionally) after a reboot of my shorewall[-lite] machine I find that I end up with conntrack table entries for unNATted connections such as: # conntrack -L -p udp --dport 5060 -d 99.232.11.14 udp 17 59 src=10.75.22.8 dst=99.232.11.14 sport=5060 dport=5060 packets=5472 bytes=3031488 [UNREPLIED] src=99.232.11.14 dst=10.75.22.8 sport=5060 dport=5060 packets=0

I am dealing with a huge matrix in R (20 columns, 54000 rows) and have lots of missing values within the dataset which are currently displayed as the value "-999.00" I am trying to create a new matrix (or change the existing one) to display these values as "NA" so that I can then perform the necessary analysis on the columns within the matrix. The matrix name is temp and the

$B!g!g!g!g!y!g!g!g!g!g!y!g!g!g!g!g!g!g!g!g!y!g!g!g!g!g!y!g!g!g!g!g(B $B!c(BNO.I don't veceive your mail$B!d"M!!(Becchi_daisuki69@yahoo.com.au $B!c:#8e!"<u?.$r5qH]$9$k>l9g$O!d"M(Bsweets85433@yahoo.com.au $B!g!g!g!g!y!g!g!g!g!g!y!g!g!g!g!g!g!g!g!g!y!g!g!g!g!g!y!g!g!g!g!g(B

Hi, I was looking for a package that would help with outlier detection for bimodal distributions. I have tried 'outliers' and 'extremevalues' packages, but am not sure if they are ok for bimodal distribution. Any help would be highly appreciated! thanks, [[alternative HTML version deleted]]

I think I really hosed my certificates somehow this morning trying to get PuppetDB and Puppet talking again -- here''s where I stand. My Puppet master and PuppetDB are again talking, or at least, aren''t complaining about communication. From my puppet master, I can run "puppet agent -t", and it runs just fine. From any other node on which puppet had been running, I

Dear all, I am including a part of the text from smb.log. I have followed the instructions in "Using Samba" but to no avail. I have checked through the troubleshooting chapter which directed me to the logs initially, but has nothing specific to say about bad news contained therein. The output of the log makes it clear that the problem is related to the smp_passwd file but I am not

Readers of this mailing list may be interested to know that the book "A Beginner's Guide to Generalized Additive Models with R' is now available from: http://www.highstat.com/BGGAM.htm Upcoming books in 2013: A Beginner's Guide to GLM with R and JAGS. AF Zuur, J Hilbe, EN Ieno A Beginner's Guide to GAMM with R. AF Zuur, AA Saveliev, EN Ieno Kind regards, Alain Zuur

Thomas, may I also suggest, from the Documentation>Contributed section of CRAN, "Econometrics in R" by Grant Farnsworth http://cran.at.r-project.org/doc/contrib/Farnsworth-EconometricsInR.pdf (see the chapter on Time series) and, in case you can read Italian, "Analisi delle serie storiche con R" by Vito Ricci http://cran.at.r-project.org/doc/contrib/Ricci-ts-italian.pdf

Hi, I have been looking at the LLVM JIT system as a basis for a project I am working on and had a few beginner's questions which I was hoping someone might be able to answer and which I haven't yet been able to figure out reading the source code. If anyone could provide some help I would appreciate it. 1) How does one go about calling a precompiled function external to the JIT from a JIT

Can someone please recommend a novice/beginner's reading list for non-programmers learning R? --------------------------------- 8:00? 8:25? 8:40? Find a flick in no time [[alternative HTML version deleted]]

Begging the list's indulgence, an extremely dumb beginner's question. I've got 24 months' worth of numbers - ranging from 2 events per month, to 66 events per month. I want to take a stab at making a reasonable guess as to what the next year's data would be, approximately, i.e., based on the 24 months I've got, I want to be able to tell someone: "the 12 months after