similar to: Data frame row manipulation

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

Dear all -- I have a data frame containing data related to heat gain through windows. The general form is ... Key ProfA IAC <many other numeric columns> AAA 0 .7 AAA 10 .6 AAA 0 .66 AAA 20 .45 (more AAA rows) (then AAB rows) 'Key' identifies the physical configuration ... rows with a given Key contain data for same window under various

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 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

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, 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.

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

Hi! I'' ve a xen virtual machine, and i'' d like to assign cdrw device to it. My physical device on domain0 is /dev/hda, and in the configuration file i'' ve this: disk = [ ''phy:vg0/vx-disk,sda1,w'', ''phy:vg0/vx-swap,sda2,w'', ''phy:vg0/vx-data,sda5,w'' ] I'' ve tried to assign the cdrom to it in many ways i

Hello, Summary: "samba-tool domain join" doesn't seem to work if you pass both "-k yes" and -U. Samba version: 4.9.5-Debian I have a newly-provisioned AD domain with a single DC (dc1). I'm attempting to join a second DC (dc2), per the wiki. On dc2: - I have /etc/resolv.conf pointing at dc1 (confirmed all AD DNS resolution works) - I've copied the basic

The driver doesn't consider framebuffer pitch and offset, leading to a wrong display in case offset != 0 or pitch != width * bpp. Fix it. Signed-off-by: Gerd Hoffmann <kraxel at redhat.com> --- drivers/gpu/drm/bochs/bochs.h | 2 +- drivers/gpu/drm/bochs/bochs_hw.c | 14 ++++++++++---- drivers/gpu/drm/bochs/bochs_kms.c | 3 ++- 3 files changed, 13 insertions(+), 6 deletions(-)

Can anyone here help me out with a client side Outlook issue? I know outlook is a horrible imap client :( We intermittently have a problem where mail gets "stuck" in Outlook users' outboxes. Might have anything to do with dovecot? Is there anyway I can troubleshoot this server side? Are there any settings I can tweak? We have a new and an old dovecot server (see below) and both

Hi there, when plotting a time series I got this error message: Error in xy.coords(x, y, xlabel, ylabel, log) : x and y lengths differ In addition: Warning messages: 1: longer object length is not a multiple of shorter object length in: vx.1[int.lr] + (-1) * vx.2[int.rl] vx.1[int.rl] and vx.2[int.rl] have the same length. Does anybody know what the warning message means? Thanks, Sven

Dear R Help Please forgive my lack of knowledge,.I would be very thankful for some help. Here is my problem: I was using optim to estimate parameters of a model and I get this error message "Error in optim(x0, fn = riskll, method = "L-BFGS-B", lower = lbs, upper = ubs, : L-BFGS-B needs finite values of 'fn'" Below is the R code I have written.

Dear R developers, A great R feature is that elements of vectors, lists and dataframes can have names: vx = c(a=1, b=2) lx = list(a=1, b=2) Accessing element "a" of vx: vx['a'] Accessing element "a" of lx: lx[['a']] or lx$a Might be a matter of taste, but I like the $ very much. Unfortunately, vx$a is not functional. Would it break existing compatibility

If bo->width doesn't match fb->width the driver fails to configure the display correctly, resulting in a scrambled display. Fix it. Signed-off-by: Gerd Hoffmann <kraxel at redhat.com> --- drivers/gpu/drm/bochs/bochs.h | 2 +- drivers/gpu/drm/bochs/bochs_hw.c | 13 +++++++++---- drivers/gpu/drm/bochs/bochs_kms.c | 1 + 3 files changed, 11 insertions(+), 5 deletions(-)

Dear All, I am doing some exercise in statistics textbook on comparison of two experimental means. Is it possible to use t.test() do t-test when I have only two means, sample size, two standard deviations ? (no raw data). Thanks. Pramote

I'm trying to convert an S-Plus program to R.  Since I'm a SAS programmer I'm not facile is either S-Plus or R, so I need some help.  All I did was convert the underscores in S-Plus to the assignment operator <-.  Here are the first few lines of the S-Plus file:   sshc _ function(rc, nc, d, method, alpha=0.05, power=0.8,              tol=0.01, tol1=.0001, tol2=.005, cc=c(.1,2),

Hi configure samba4 with --with-sys-quotas and check bin/config.log see this message: ------------------------------------------ Checking for header sys/fs/vx/quota.h ==> #include <stdio.h> #include <sys/types.h> #include <sys/stat.h> #include <stdlib.h> #include <stddef.h> #include <memory.h> #include <string.h> #include <strings.h> #include