similar to: reshape/aggregate

Dear R users, Given this data: x <- seq(1,100,1) dx <- as.POSIXct(x*900, origin="2007-06-01 00:00:00") dfx <- data.frame(dx) Now to play around for example: subset(dfx, dx > as.POSIXct("2007-06-01 16:00:00")) Ok. Now for some reason I want to extract the datapoints between hours 10:00:00 and 14:00:00, so I thought well: subset(dfx, dx >

Hola a todos, -Estoy estudiando el efecto de dos genotipos (~tratamientos) en la aparición de síndrome metabólico (MetS) con datos longitudinales recogidos a tiempo 0,7,10,15,20 y 25 años. -He hecho un dataframe con las siguientes variables MetS: Síndrome Metabólico (Si=1,No=0) bmi: Indice de masa corporal (IMC) cuando se produce la conversión a MetS+ . Para los que permancen MetS-, esta variable

Hi, I am trying in R to indicate in which quintile a value of a variable is for every month of my data frame in this case based on volatility. For each month I want to know for each stock if it is in the most volatile quintile of if it is in one of the others. So far I have come up with the following function (see below). Unfortunately, the function only works in some cases and often gives the

Dear All, How can I sort a data frame with respect to more than one variable? I know that for one variable X one may use: df[order(df$X), ] where df is the data frame containing X. Many thanks, Bernard --------------------------------- [[alternative HTML version deleted]]

I tried: n <- 9 x <- sample(n) names(x) <- LETTERS[1:n] dotplot( sort(x) ) The lines of the dotplot are not ordered according to the values of x (but according to the names of x). So I did: dfx <- data.frame( x=x, label=factor( names(x), names(x)[order(x)] ) ) dotplot( label ~ x, data=dfx ) So I got what I wanted. My question: Is there an easier solution

This is just a curiosity question. Why do the two different syntaxes for df1 and df2 give such different results in the names(dfx)? Thanks df1 <- data.frame(nas = c("A", "B" , "B" ,"C" ,"B", "A", "D"),nums = c(3, 2, 1, 1, 2, 3, 7)) df2 <- data.frame(nas <- c("A", "B" ,

Hi I'm having a problem with model.frame, encapsulated in this example: y1 <- matrix(c(3,1,0,1,0,1,1,0,0,0,1,0,0,0,1,1,0,1,1,1), nrow = 5, byrow = TRUE) y1 <- as.data.frame(y1) rownames(y1) <- paste("site", 1:5, sep = "") colnames(y1) <- paste("spp", 1:4, sep = "") y1 model.frame(~ y1) Error in model.frame(formula, rownames,

https://bugzilla.mindrot.org/show_bug.cgi?id=3666 Bug ID: 3666 Summary: sshd crash Product: Portable OpenSSH Version: 8.2p1 Hardware: Other OS: Linux Status: NEW Severity: critical Priority: P5 Component: sshd Assignee: unassigned-bugs at mindrot.org Reporter:

Hello, I forgot in my last reply that my DWT implementation can be speed up, for example I'm doing for now: for (;_X1<_E_;_X1++,_RES+=2) //dilatation { _RES[0]=_X1[0]<<3; _RES[1]=(_X1[1]+_X1[0])<<2; } then for (;_X2<_E_;_X2++,_RES+=2) //details { _RES[0]-=(_X2[1]+_X2[0])<<1; _RES[1]+=6*_X2[1]-_X2[2]-_X2[0];

https://bugs.freedesktop.org/show_bug.cgi?id=46810 Bug #: 46810 Summary: Mesa Failing To Build Classification: Unclassified Product: Mesa Version: git Platform: x86-64 (AMD64) OS/Version: Linux (All) Status: NEW Severity: normal Priority: medium Component: Drivers/DRI/nouveau

Each register is a 4-component (namely, r, g, b, a) vector register. They are actually defined as llvm packed [4xfloat]. The instruction: add_sat r0.a, r1_bias.xxyy, r3_x2.zzzz Explaination: '.a' is a writemask. only the specified component will be update '.xxyy' and '.zzzz' are swizzle masks, specify the component permutation, simliar to the Intel SSE permutation

Actually the problems that Tzu-Chien Chiu are encountering are similar to what should be done for generating SSE code in the X86 backend and also other SIMD instruction sets. I think LLVM neeeds to add instructions for permuting components, extracting and injecting elements in packed types. If the architecture has instructions which can do permutations for each instruction (for example

Summary: I have tried the packaging-only repo and I really don't like it at all. I don't know how anyone copes with this - such hard work! IMO we should switch to git-debrebase. (As an alternative, if you don't trust git-debrebase because it's my own tool, gbp pq would be better, too, even though it's not as good as git-debrebase.) Particularly, now that we have more people

Hi All, This question was brought up some time ago but I never saw a reply so I'd like to bring it up again. When using ROracle package (version 0.5-5), I am unable to run any queries that are greater than 4000 characters in length. If I do, I get the following message: Error in oraPrepareStatement(con, statement, bind=NULL) : RS-DBI driver: (too long a statement -- it must has less than

Hello list. I'm trying to rebuild the 2.6.9.67.0.20.EL kernel, but it fails even without modifications. How did I try it? Created a (non-root) build environment (not a mock ) Installed the kernel.scr.rpm and did a rpmbuild -ba --target=`uname -m` kernel-2.6.spec 2> prep-err.log | tee prep-out.log The build failed at the end: Processing files: kernel-xenU-devel-2.6.9-67.0.20.EL Checking

<-----------------------------------------------------------------------> Changes to user passwords are captured by a special DLL, which traps and then stores the password changes in encrypted form in a private area. On each synchronization schedule, the synchronization service first examines the SAM file for changes, and then checks this private area for passwords to be synchronized. Once

network. I did read somewhere on the web (several years ago) of a guy who managed to boot windows from the net. With the start of Win 98/ME/ etc.etc it's not posible anymore. I currently use PXE to install machine from the net using bpbatch that works great only bpbatch is not really under developnt and the script language is a bit buggy. I see only one option to boot windows from the net and

I''m working on a new Rails (v3.0.0.rc) application using the Devise (v1.1.1) gem. In my application I have setup a User model which includes the person''s e-mail address and name. I have also setup the following models that I''d like to attach to the User: - Address (street, city, state, zip code) - Interest (name) - Donation (date of donation, amount) My question is