similar to: Aggregate() questions

Dear all -- I want to compute weighted.mean() for grouped rows. Data frame extract is just below. For each Key, I want the mean of IAC weighted by Wt. DP0[1:20,] Key IAC Wt 2 C3-PD030020050.PD030020050.3.12.3.0 0.765 0.8590000 3 C3-PD030020050.PD030020050.3.12.3.0 0.764 0.8449651 4 C3-PD030020050.PD030020050.3.12.3.0

Dear R-ers, My aggregation saga continues. Using the following sequence, I can calculate any statistic for row groups and merge the result back to all associated rows ... > WM = by( D60, D60[ "KeyProfA"], FUN=function(x) weighted.mean( x$IAC, x$Wt)) > D60$IAC.WM = as.numeric( WM[ D60$KeyProfA]) > class( WM) [1] "by" Questions ... 1) Is this a reasonable way

Dear all, Is there a less cumbersome way to rename a column by name (as opposed to index) than -- names( X)[ names[ X] == "bob"]<-"sue" ? A semi-related question: how does one get the index of a column by name, something along the lines of col.index( X, "sue") ? Chip Barnaby --------------------------------------------------------- Chip Barnaby

Hello, I would like to create a subscriptable collection (presumably a list) of lm() models. I have a data frame DX containing 6 groups of data. The general idea is (NOT RUN) ... for (i in 1:6) { DXS = subset( DX, <whatever>); LMX[ i] = lm( <formula>, data = DXS); } Now access model results by subscript ... e.g. coefficients( LMX[ 2]). Or would it be [[ 2]]? I

Greetings, Q #1 ------ How does one combine data frames by row ... no cleverness a la merge(), just add rows. For example, given A with 20 rows and B with 30 rows, I want C = combine( A, B) having 50 rows. Columns having matching names should be filled from both (all) sources with suitable coercion, unmatched would get NA in rows whose source does not have that column. Q #2 ------ Given

Dear R-people ... I'm a new user. I can't get predict.lm() to produce predictions for new independent data. There are some messages in archived help about this problem, but I still don't see my error after reviewing those. I understand that the new independent data must have the same name(s) as used when the model was made. In the example below, predict.lm produces the

I am trying to use the friedman.test() on a data frame, d, but I am receiving the following error message: > d AW HS IAC WA 1 6 8 3 5 2 2 2 3 6 3 7 7 8 3 4 8 5 4 5 .... 20 2 5 2 7 21 7 7 6 7 22 7 8 6 8 23 6 8 4 5 24 5 7 5 2 > friedman.test(d) Error in any(is.na(groups)) : argument "groups" is missing, with no default I think I

Hi, I'm a complete linux newbie, let alone wine, easy-peasy and netbooks. Having said that, I'm looking at buying the eee pc 701 sd and putting easy-peasy on it. However the reason I need a netbook is to run a cricket scoring program that is only available in windows. I didn't want to fork out for the netbook until I knew the cricket software will run, so I tried the following: 1.

Am 02.07.23 um 18:01 schrieb Duncan Murdoch: > This SO post: https://stackoverflow.com/q/76583828 describes a strange R > CMD check error. Depending on the contents of a comment in one of the > examples sections of a help page, an error like this could be triggered: > > > base::assign(".dptime", (proc.time() - get(".ptime", pos = >

Hi I have a FORTRAN version of the L-BFGS-B algorithm and I was comparing it to the code in the lbfgsb.c file available at R-4.0.0.tar.gz Everithing looks the same, except for those two lines that must be printed by the prn3lb function in case of an error (lines 3559 and 3561 in lbfgsb.c): case -5: Rprintf("l(%d) > u(%d). No feasible solution", k, k); break; case -7:

Hi, We have a problem with Syslinux 2.07 and APM on an SMP system. When either network booting with pxelinux.0 or CDROM booting with isolinux we get a kernel error message: Jan 7 09:59:51 ddcserver1 kernel: kernel BUG at apm.c:1756! Jan 7 09:59:51 ddcserver1 kernel: invalid operand: 0000 Jan 7 09:59:51 ddcserver1 kernel: Jan 7 09:59:51 ddcserver1 kernel: CPU: 1 Jan 7 09:59:51 ddcserver1

This SO post: https://stackoverflow.com/q/76583828 describes a strange R CMD check error. Depending on the contents of a comment in one of the examples sections of a help page, an error like this could be triggered: > base::assign(".dptime", (proc.time() - get(".ptime", pos = "CheckExEnv")), pos = "CheckExEnv") >

Is there a limit to the number of columns that a data.frame can have? For example, can I read.csv() a file that has 1000 columns and 10,000 rows, will it break or is it limited by available memory. ................................................................................... Philip Sobolik 781-862-8719 x111 Wrightsoft Corporation 781-861-2058 fax 394 Lowell

Hi, until now I have run Xen with /lib/tls out of the way for both dom0 and domU''s, but now I''m trying to install OpenLDAP in a domU, which requires TLS as default. So now I have at least three options ahead of me: 1. mv /lib/tls.disabled back to /lib/tls and accept the performance penalty (is there any documentation on how heavy this penalty is?) 2. Compile OpenLDAP

Dear all, I'm trying to run a script that requires KernSmooth in BATCH mode but I get an error while loading rgl library that is needed by KernSmooth. Actually I have to run several batch files through a queue of a cluster, so I wouldn't need graphics at all. I installed the latest releases of R (2.6.1) and rgl on my CentOS 4.2 Linux (clone of Red Hat EL) endowed with Rocks 4.2.1 suite

Hello together i want to execute different commands that are saved in strings (eg: "d <- 4+7" and some more complicated things). How can i execute/evaluate them. I know i could save them to a temp-file a read this with source. But is there a way without a file in the middle? I know also the 'assign' command but I think it would only the simply cases. thanks and gruess joerg

Ugh. With MAKE_KERBEROS5=yes, on a recent STABLE, I get the following trying to use Kerberized telnet: # telnet -l test big.x.kientzle.com Trying 66.166.149.54... Connected to big.x.kientzle.com. Escape character is '^]'. [ Trying mutual KERBEROS5 (host/big.x.kientzle.com@X.KIENTZLE.COM)... ] Bus error (core dumped) Fortunately, it's pretty easy to track down: (gdb) up #2

Hello everybody, a question that connect to the question of Frederik Karlsons about 'how to stand. betas' With the stand. betas i can compare the influence of the different explaning variables. What do i with the betas of factors? I can't use the solution of JohnFox, because there is no sd of an factor. How can i compare the influence of the factor with the influence of the numeric

Hope Im posting on the correct forum... I currently work for IAC / InterActiveCorp (www.iac.com) - owners and operators of Ask Jeeves, LendingTree, Match.com, etc. etc. Also pursuing a very interesting side project that is NOT affiliated with IAC. Looking to have a feedback / ratings system developed using RoR. Would prefer to work with US-based programmers. Would expect the project to

Johan accidentally wrote me personally with the following email, which I thought would be better intended for the syslinux list. Replies to *Johan* please. :) -d ----- Original Message ----- From: "Johan Win?s" <johan.winas at isg.se> To: <david at weekly.org> Sent: Thursday, January 16, 2003 2:33 AM Subject: syslinux with flash discs? > Hi.. > > Just tried out