similar to: easy question

Dear R-list, I have two variables (numerical and categorical) and would like to have the sum (and maybe some other statistics) of the numerical variable by the categorical one. Can you help me, Thank you, Fabrizio --------------------------------------------------------------- Fabrizio De Amicis IT Department Generali Information Technologies - (GIT) Centro Galleria 2, Via Cantonale CH -

Another easy(/stupid) question: with the following command j2<-xf1[1:10,"V4"] I have > j2 [1] CHROMOLI LINEAGERMAI RINALDI GIUNTIMA AUTOSTELLA [6] CAIZZONE CENTRO B PEL E C SNC CONSORZI MAN NORD PDM 1304 Levels: MACHIAVELLI Snc MENARINI MANUFACTURERS LOGISTICS SERVICES ... ZUCCHERIFICIO

Hello, Thanks to all for the previus answer. I want to be more detailed: I have a dataset called gm20011231 with 1304 observations (or records). I want to create a subset with the followin command j2<-gm20011231[1:10,"V4"] the levels of "V4" is 1304 and the and the length(j2) is 10. Do you know how to obtain a j2 with level 10? Thank you Fabrizio

Hello to all, I've a frustrating issue, everytime I'm trying to connect to some website (like Linkedin, VMware, CertCollection, etc etc) I have issue with credentials... Or the website didn't recognize my login (and I'm still in login page) or for example I'm logged in linkedin but I'm not able to see which visit my profile cause it ask me my credentials and when I enter

Hello to all, I'm currently studying (and collecting notes here https://github.com/fdicarlo/RHCSA_cs) for RHCSA. My plan is to RHCSA -> RHCE and then RHCSS. What I want to ask you is: - What do you think about it? - Did you find it useful? - Do you have any advices? Best regards, Fabrizio -- "The intuitive mind is a sacred gift and the rational mind is a faithful servant. We have

Hello to all, currently I have CentOS 6.4 32 bit, very simple setup on my notebook, I want to migrate it from 32 to 64 bits cause I want to play with some VMs etc etc. Do you have some suggestions on how to do backup of folders (mainly I have 1 user) or just copy the user folder and stop? Fabrizio -- "The intuitive mind is a sacred gift and the rational mind is a faithful servant. We

Hello to all, I have a question, maybe it's a very newbie question. I've installed CentOS 6.4 on my notebook but sometimes when I boot it, after the screen "booting CentOS in 4..3..2..1" I receive a black screen and not the logo of CentOS with loading progress. Is it normal? There are some know issue about it? Best regards, Fabrizio -- "The intuitive mind is a sacred

Hello to all, I'm in love with CentOS from several months and I want to contribute to the project, unfortunately I'm not a developer, so how is possible to contribute to the project? Regards, Fabrizio

Hi all, I'd like to authenticate my fresh Samba installation against an LDAP server without the Samba schema. Obviously I cannot touch it. So I'd like to use LDAP just for the authentication without getting the UID and the other parameters from it. I can use the same UID, home folder and so on for all the users, the only important thing is to provide access only to the LDAP users. Is

I have installed various pc with the version Syslinux 3.31 without particular problems. Trying new 3.52 or 3.36 the PC does not leave more giving the message Returning to the previous version all it resumes to work correctly. What I have mistaken? Thanks. _____________________________________________________ Fabrizio Guerriero EDP Manager C.C.M. Coop.Cartai Modenese Soc.coop. Via F.

I'm having slight problems with outgoing audio quality on Zap channels. People hear an interrupted voice. Can anyone help..? Regards, Fabrizio Mazzoni Macron SPA

Hello everybody (I'm new here) I am looking for 2 specific functions. The first one is a variance formula that does not divide by n-1 (I don't want the unbiased formula, that's it). In case it does not exist, how do I modify the default function code? Yes, a workaround would be to multiply the result by n-1 and then divide it by n, but I'd like to use a separate function, if

I've installed icecast2 and ices (from CVS 3 days ago) on a Redhat9 box (Celeron 2Ghz, 256Mb ram, SoundBlaster Live 5.1 sound card). I'm streaming live from soundcard at 44.100 with a 128kbit stream and 2 channels. The problem is that with 2 channel, there is a small delay between the channels; if I use only 1 channel, all is ok, but I need stereo signal with optimal quality. The cpu

My setup is Samba/smbclient version 3.0.1 on linux RedHat 9. \\snapper\dfs is a dfs share on snapper, a Win2k3 Active Directory server. My smb.conf contains: [global] realm = ciswinnet.cis.uab.edu workgroup=CISWINNET security = ADS encrypt passwords = yes password server = snapper.cis.uab.edu client use spnego = yes I am trying to run the following command: smbclient \\\\snapper\\dfs

Anyone have any theories or experiences as to why for a certain user, some of his imap processes hang, and stay around for days and days? He just reported that his Thunderbird was timing out when trying to open folders, I looked on the server, and he had 3 old imap processes from 1 week+ ago. I killed those and his performance immediately improved. He checks mail with Thunderbird > 1.5

On Linux 2.13 by default links cairo, so png() uses it for rendering. One of my users has performance problem, so ask if it possible to temporary disable cairo during png() rendering so it reverts to grGraphics. My workaround for now is to configure R without cairo, but this affects all users that are forced to load and use CairoDevice if they wants better quality. I want to avoid this, is it

Good morning! Which is the preferred method to leave a sourced script and returning back to the '>' prompt? For example I search for certain files to be processed, but nothing should be done if they are not present. Normally I do in my script: f<-dir(pattern="qq") if(length(f) > 0) { ...process file list... } # script end But I don't like those {} encompassing

Any advice when to use denstity() and when the KernSmooth package bkde() to smooth a histogram? No specific problem to use either one, but I'm curious why there are two so similar implementations. Thanks! mario -- Ing. Mario Valle Data Analysis and Visualization Group | http://www.cscs.ch/~mvalle Swiss National Supercomputing Centre (CSCS) | Tel: +41 (91) 610.82.60 v.

Whas missing the R in the command line: "mpirun -n --hostfile /home/hostfile R --no-save -f rtest.R" Hope this helps mario On 13-Jan-11 22:08, Justin Moriarty wrote: > Hi, > Just wanted to share a working example of doSNOW and foreach for an openMPI cluster. The function eddcmp() is just an example and returns some inocuous warnings. The

I'm trying to make more compact the definition of a function as for example: f <- function(x) 2/x+3/x by simply defining the array of coefficients arr = c(2,3) and setting: g <- function(x) sum((arr/x)) Everything seems to work fine because the values returned by f and g result coincident for different values of their argument, but when I try to plot the function g using: x =