YES! many many thanks, Jim. I know it'd be simple, yet I can't believe it's that simple. =)
-gary -----Original Message----- From: jim holtman [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 10, 2008 11:55 AM To: Ling, Gary (Electronic Trading) Cc: Peter Dalgaard; r-help@r-project.org Subject: Re: [R] loop with splitted data Is this what you want: > lapply(z, '[[', 1) [[1]] [1] 1 2 3 [[2]] [1] 11 12 13 > lapply(z, '[[', 2) [[1]] [1] 4 5 6 [[2]] [1] 14 15 16 > On Wed, Sep 10, 2008 at 11:43 AM, Ling, Gary (Electronic Trading) <[EMAIL PROTECTED]> wrote: > Hi R users, I have a question which is some what related to this thread. > > Here is the setup: > z is a list of lists, with no names. > zz is same is z, but with names. > with names on zz, I can crawl on the data with lapply, but I don't know how > do the same on z (without names). Can someone help? > > > ### === here is the code, which explains more clear of my problem > x <- list(1:3,4:6) > y <- list(11:13,14:16) > z <- list(x,y) > > xx <- x > names(xx) <- c("1","2") > yy <- y > names(yy) <- c("1","2") > zz <- list(xx,yy) > > lapply(zz, "[[", "1") > lapply(zz, "[[", "2") > # Question: how can I get the same thing from z? > # i.e. lapply(z, "[[", <???>), what is <???> so that > # I can get the same values as lapply(zz, "[[", "1"). > # I tried <???>=[[1]], <???>=[1], <???>="[[". They all don't work. > # I feel that I need a string or something to tell lapply what I want. > > This is a simplify version of my problem; in my case, I can't name all the > sub-lists, please help. > > Thanks in advance, > Gary > > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Peter Dalgaard > Sent: Tuesday, August 26, 2008 6:27 PM > To: jim holtman > Cc: r-help@r-project.org > Subject: Re: [R] loop with splitted data > > > jim holtman wrote: >> Is this what you want: >> >> >>> y = c(rep(2,5),rep(3,5)) >>> ma <- data.frame(x = 1:10, y=y ) >>> splitted <- split(ma, ma$y) >>> for (counter in (min(ma$y):max(ma$y))) >>> >> + { >> + cat(counter, ":", splitted[[as.character(counter)]]$x, '\n') >> + } >> 2 : 1 2 3 4 5 >> 3 : 6 7 8 9 10 >> >> > But maybe this is what he really wanted: > > > lapply(splitted,"[[", "x") > $`2` > [1] 1 2 3 4 5 > > $`3` > [1] 6 7 8 9 10 > > or even > > > split(ma$x, ma$y) > $`2` > [1] 1 2 3 4 5 > > $`3` > [1] 6 7 8 9 10 > > -- > O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B > c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K > (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 > ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -------------------------------------------------------- > > This message w/attachments (message) may be privileged, confidential or > proprietary, and if you are not an intended recipient, please notify the > sender, do not use or share it and delete it. Unless specifically indicated, > this message is not an offer to sell or a solicitation of any investment > products or other financial product or service, an official confirmation of > any transaction, or an official statement of Merrill Lynch. Subject to > applicable law, Merrill Lynch may monitor, review and retain e-communications > (EC) traveling through its networks/systems. The laws of the country of each > sender/recipient may impact the handling of EC, and EC may be archived, > supervised and produced in countries other than the country in which you are > located. This message cannot be guaranteed to be secure or error-free. This > message is subject to terms available at the following link: > http://www.ml.com/e-communications_terms/. By messaging with Merrill Lynch > you consent to the foregoing. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve? ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
