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Hi, I'm just starting out with R and came across R_inferno.pdf by Patrick Burns just yesterday - I recommend it! His description of how 'growing' objects (e.g. obj <- c(obj, additionalValue) eats up memory prompted me to rewrite a function (which made such calls ~210 times) so that it used indexing into a dimensioned object instead (i.e. obj[i, ] <- additionalValue). This

Dear R-users, I have a dataset with categories and numbers. I would like to compute and add cumulative numbers to the dataset. I do not understand the structure of by(...) or tapply(...) output enough to handle it. Here a small example -------------- d<-expand.grid(a=1:5,b=1:3,c=1:2) d$n = 10 * d$a + d$b +0.1* d$c Sn<-by(d$n,list(d$a,d$c),cumsum) str(Sn) --------- List of 10 $ : num

All, I have a data file with 56 entries that looks like this: City State JanTemp Lat Long Mobile, AL 44 31.2 88.5 Montgomery, AL 38 32.9 86.8 Phoenix, AZ 35 33.6 112.5 Little Rock, AR 31 35.4 92.8 Los Angeles, CA 47 34.3 118.7 San Francisco, CA 42 38.4 123.0 I would like to "read" this data into a dataframe. Is it possible to do without editing the datafile? D.

With a recent update of CentOS4, su's behavior has changed, in that after prompting for password, also prompts for (selinux?) context. I'm seeing something like: $ su Password: Your default context is root:system_r:unconfined_t. Do you want to choose a different one? [n] kde's kdesu barfs on this second prompt. Any way to disable this second prompt? -- Rex

Hi, How can I extract the label only from a given data frame. Fore example from this data frame. > print(dataf) V1 V2 V3 V4 V5 V6 V7 V8 V9 11145 14.3 17.1 31.2 41.7 45.8 49.8 68.6 70.6 72.9 3545 10.2 15.6 20.9 23.2 31.4 31.7 36.2 48.4 51.9 8951 15.2 17.5 20.0 21.4 32.4

Greetings, I would like to plot three lines on the same figure, and I am lost. There is an answer to a similar thread… but I tried matplot and it is beyond me. An example of the data follows: Year EM IM BM 1983 9.1 16.8 -7.7 1984 12.0 18.0 -6.0 1985 13.6 19.1 -5.5 1986 12.4 17.3 -4.9 1987 14.6 20.3 -5.7 1988 20.6 23.3 -2.6 1989 25.0 27.2 -2.2 1990 28.4 30.2 -1.8 1991 33.3 31.2 2.1 1992 40.6

I apologize that I've asked a similar question before, but being new to R I don't think I did a very good job of formating the question. I've included a text file since the date set is somewhat large. What I have is a huge string of numbers in a text file. The numbers are all separated by comma's and the groups are separated by a semicolon. What I would like to do is read each

Hi r-users,   I have a data below but I would like to rearrange my data so that it will be in the following format: year, month, day, rain.  I also would like the data to be arranged so that it will be continues for example year 1939 it will go from january 1 to december 31 and continue with year 1940 from january 1st to 31st December and so on.  What I have now is all january for all the years

Dear All, I faced the following problem. With the same data.frame the results are different under Linux and Windows. Could you help on this topic? Thanks in advance, Ildiko Linux: > d = read.csv("CRP.csv") > d$drugCode = as.numeric(d$drug) > cor(d, use="pairwise.complete.obs") PATIENT BL.CRP X24HR.CRP X48HR.CRP drug drugCode PATIENT NA

Here we go again: Hi all. Most of you already know about my problems (well, my computer?s problems ;-) ), since we?ve been discussing on the forum. Hughesjr recommended me to post here, so let?s see, I have my faith on you I have a dedicated server with RH9 that I upgraded to CentOS 3.4 . Everything ok, but after the first yum upgrade and reboot I get this when I try to do a yum update:

Hi all. Most of you already know about my problems (well, my computer's problems ;-) ), since we've been discussing on the forum. Hughesjr recommended me to post here, so let's see, I have my faith on you. I have a dedicated server with RH9 that I upgraded to CentOS 3.4 . Everything ok, but after the first yum upgrade and reboot I get this when I try to do a yum update: yum

Dear all- I have a dataset (see a sample below - but the whole dataset is June 2005 - June 2008). The "LST" format is "YYMMDDHHmm" and I would like to get the hourly average of the "mph" for the summer months (spanning all years). I have been trying to use "aggregate" but am not having much success at all! any thoughts would be greatly appreciated.

Hi, I want to remove the entire row from the dataset if any of the row contains blank or NA my dataset look like State Year Y X2 X3 X4 X5 X6 State1 1960 27.8 397.5 42.2 50.7 78.3 65.8 State2 1960 29.9 413.3 38.1 52 79.2 66.9 State1 1961 29.8 439.2 40.3 54 79.2 67.8 State2 1961 30.8 459.7 39.5 79.2 69.6 State1 1962 31.2 492.9 37.3 54.7 77.4 68.7 State2 1962 528.6 38.1 80.2 73.6 State1 1963

Noticed firefox is one of the only critical sec. updates from 6.6. So I manually downloaded the rpm from cr repo and rpm -Uvh firefox-31.2.0-3.el6.centos.x86_64.rpm but it crashes with /usr/lib64/firefox/firefox: symbol lookup error: /usr/lib64/firefox/libxul.so: undefined symbol: gdk_window_get_visual

I have a series of numbers I'm wanting to plot. They come from a nanodrop machine, which graphs with a specific x and y indices. X goes from 220nm to 350nm, which I can set. But the y axis should go from -5 to 65, but I'm finding it impossible to hardcode that. I've looked. I've typed ?plot at the R prompt. Google has not been my friend. _R Graphics_, if it holds the key, has not

Dear List, This is my second post since I did not receive any answers the first time. I have P4P800-VM motherboard with serial ata controlers (ICH5) and serial ata discs. I managed to install FreeBSD 4.9-STABLE on this box when setting the IDE controller in legacy mode. Everything works normal except when booting, the drives are set into UDMA33 mode: atapci0: <Intel ICH5 SATA150

Hi I'm performing a PLS This is my data present in a file Year Y X2 X3 X4 X5 X6 1960 27.8 397.5 42.2 50.7 78.3 65.8 1960 29.9 413.3 38.1 52 79.2 66.9 1961 29.8 439.2 40.3 54 79.2 67.8 1961 30.8 459.7 39.5 55.3 79.2 69.6 1962 31.2 492.9 37.3 54.7 77.4 68.7 My R-code Data <- read.csv("C:/TestData.csv") variable=names(Data)[4:8] dataset=NULL dataset$X=NULL len=length(variable)

I have updated my instructions on how to roll your own CentOS-4 Live CD. I also made a script which does it all for you. I have also got instructions on how to turn the Live CD into a PXE bootable Live version. All the details can be found here: http://www.byteclub.net/wiki/CentOS_Live John. -- John Newbigin Computer Systems Officer Faculty of Information and Communication Technologies

I just noticed the 4.9-20030914-PRERELEASE and made a set of installation boot floppies from it to see which of the devices in my new PC the PRERELEASE would support. It wedged hard during the boot autoconfiguration monologue, just after typing these lines on the console: atapci0: <Intel ICH5 ATA100 controller> port 0xf000-0xf00f,0-0x3,0-0x7,0-0x3,0-0x7 irq 0 at device 31.1 on pci0 ata0:

Hi, Basically, inner_prod() can and should be adapted to the architecture it will run on. It is not really sensitive to noise, so it's possible to tweak it a lot. Also, in the current code, I saturate it to +-16384, which is OK to prevent overflows. I'm not concerned with the case of a constant -16384 value because it can't really happen in practice (especially after filtering). BTW,