similar to: Read time series

Hi R experts, I need know how calculate a weighted mean by group in a data frame. I have tried with aggragate() function: data.frame(x=c(15,12,3,10,10),g=c(1,1,1,2,2,3,3),w=c(2,3,1,5,5,2,5)) -> d aggregate(d$x,by=list(d$g),weighted.mean,w=d$w) Generating the following error: Error en FUN(X[[1L]], ...) : 'x' and 'w' must have the same length Thanks in advance [[alternative

Dear R community, I have a dataframe with say 100 different variables. I wish to regress variable 1 separately on every other variable (2-100) in a linear regression using lm. There must be an easy way to do this without loops, but I have difficulties figuring this out... Can you please help? Thank you and best regards, Georg. ***************************************** Georg Ehret Johns Hopkins

What is equivalent to DROP or KEEP statements of SAS in R? -- This message was sent on behalf of sarjinder at yahoo.com at openSubscriber.com http://www.opensubscriber.com/messages/r-help at r-project.org/topic.html

Sometimes, it is too costly to read the whole data file into R. I am looking for solution in scan() and read.Lines() but don't they work. Thank you so much! -- ============================== WenSui Liu Acquisition Risk, Chase Blog : statcompute.spaces.live.com Tough Times Never Last. But Tough People Do. - Robert Schuller

Hi! I am studying to use some R libraries which are applied for working with artificial neural neworks (amore, nnet). Can you recommend some useful, reliable and easy to get example data to use in R for creating and testing a neural network? __________________________________________________________________ Make your browsing faster, safer, and easier with the new Internet

Do you know any good editor R? -- View this message in context: http://www.nabble.com/Editor-R-tp23822342p23822342.html Sent from the R help mailing list archive at Nabble.com.

Hi - I'm having difficulty with frequencies in R. I have a table with a variable (column) called "difference" 600 observations (rows). I would like to know how many values are < -0.5 as well as how many are > 0.5. The rest are obviously in the middle. In SAS I could this immediately but am unable to do it in R. Thanks for your help. -- View this message in context:

Dear list, I am leaving my old position and now need to convert my R data frames into a format that can be used by an SPSS user replacing me, without running into conversion problems. The data set consists of strings in UTF8 encoding and values in double precision floats. The data set is not terribly large, but I had bit problems getting it into R due to the large number of unfortunate characters

Hi..I am trying to run CHAID in R..I have installed the sofyware Party and trying to use the function ctree() to carry out the analysis. but I am getting the following message Error in terms.default(formula, data = data) : no terms component . I am having some Likert scale variable where I have variables like "Overall satisfaction"(Dependent Variable),"Product quality", Brand

Dear R-helpers, I would like to compare the fit of two models, one of which I fit using lm() and the other using glm(family=poisson). The latter doesn't provide r-squared, so I wonder how to go about comparing these models (they have the same formula). Thanks very much, Mark Na [[alternative HTML version deleted]]

Hi R Users, Is there a equivalent command in R where I can read in raw data? For example I'm looking for equivalent R code for following SAS code: DATA survey; INPUT id sex $ age inc r1 r2 r3 ; DATALINES; 1 F 35 17 7 2 2 17 M 50 14 5 5 3 33 F 45 6 7 2 7 49 M 24 14 7 5 7 65 F 52 9 4 7 7 81 M 44 11 7 7 7 2 F 34 17 6 5 3 18 M 40 14 7 5 2 34 F 47 6 6 5 6 50

All, I have a 30 million record text file without header information. I would like to add a header to this file without reading it first. Is this possible? The code below does what I want except that the readLines portion takes quite a long time. Is there a way around reading the lines? I'm working on Windows XP. Zev input<-readLines("c:/junk/forR.csv")

Hello guyz! I'm new here, and this is my very first truble... I need a script that will backup & compress the folder /media/system in the folder /media/backups But that's not the problem, I need that only the last 7 backups (last 7 days, yeah I know, cronjob...) will stay in that folder... The script need: 1 - Compress folder /media/system 2 - Store in /media/backups 3 - Name the

Hi, my W2K clients and users are authenticated by a native MIT Kerberos-V5 KDC, that is they get tickets and TGT, while user data are stored in an openldap directory. I use samba-3.0alpha21 which is still requiring userpasswords beeing stored in the DIT, although i have following directives in smb.conf realm = MY.REALM security = ads smb ist still not requiring and accepting tickets from KDC. How

Hello, i just switched from courier-imap to dovecot on a machine. The transition was painless except for one issue - when using the "Check mail" feature of kmail, one gets the message: "Unable to get information about folder customflags. The server replied: internal error..." So it looks like the server isn't properly hiding the .customflags file for some reason. I

Hello, we're running 2.2.1a on a production server. Lately, it's been giving us troubles. Monday mordning, this moring, and 2 times more during today, samba stopped responding to all requests from Windows (2000) clients. This has happened once before a week ago, and once several weeks ago. Today it seems to be getting much worse. If left un-attended the system will eventually run out of

Hello, I have just had a client of ours encounter an extremely weird problem with roaming profiles. Wheather or not it's samba related I do not know, but I believe it could be. The problem is that the person in question is MOVING files from one location to another inside "My Documents" while logged in using a domain account WHILE DISCONNECTED from the network. He also changes a few

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Hello, we have just observed a rather annoying behavior one of our servers. Specifically, when writing data to a file on an ext3fs filesystem at around 1.5 MB/sec, network connectivity suddently started to show signs of lag. The ping would spike up to ~1 second every 5 seconds or so. This affects the server in question and all hosts routing traffic through it (i.e., it's not a userland-only

Hey, http://slashdot.org/article.pl?sid=01/10/13/1343236&mode=thread If anyone's interested. -- / Peter Schuller, InfiDyne Technologies HB PGP userID: 0xE9758B7D or 'Peter Schuller <peter.schuller@infidyne.com>' Key retrival: Send an E-Mail to getpgpkey@scode.org E-Mail: peter.schuller@infidyne.com Web: http://www.scode.org --- >8 ---- List archives: